With each passing day, we get closer to the arrival of Avengers 4. Marvel has already confirmed that a trailer for the movie would be out for the end of the year, so it's only a matter of time before we get our first taste to how Earth's Mightiest Heroes will bring down the Mad Titan and restore the universe. Avengers: Infinity War was such a massive film and also a massive success for many reasons, so expectations are high for the next team-up film in the MCU.

Considering how big this next film is, there are many things that need to be done. We'll be seeing more of the Avengers, possibly have crazier set pieces, and we'll likely witness some greater battles along the way. There are so many different things that will happen in the film, that we've started to list the things we would like to see. Many of these desires come from speculation or rumors, so they wouldn't totally be out of the realm of possibility. After all, the current runtime is at three hours -- there's a lot that could be stuffed in that time. Likewise, there are many things Avengers 4 could do that we wouldn't like to see. Whether it be cheapening moments of Avengers: Infinity War or adding new elements that make the plot unnecessarily complex, it would be all too easy for Marvel to slip up with this movie. As our excitement for Avengers 4 grows, we're discussing ten things we'd like to see in the upcoming film, five things we don't, and five things that would be impossible to pull off.

20 WANT: THE HULK'S RETURN

Hulk in The Avengers

Hulk appeared for one scene in Avengers: Infinity War before refusing to come out again. While some hints teased his arrival at the battle of Wakanda, he never came, leaving Bruce Banner to fend for himself. Because Thanos has yet to be destroyed, it's practically a guarantee that we'll see Hulk in Avengers 4.

Having him come back after being absent for an entire film would be such a satisfying moment that it would be ridiculous for Marvel to try and do anything else. There are some rumors that the Hulk that we see could be a bit more sophisticated too.

19 DON'T WANT: LOKI'S RESURRECTION

One of the most surprising moments in Avengers: Infinity War came with Thanos strangling Loki. The opening of the film ends with Thor crying over the loss of his brother and Thanos saying, "No resurrections this time." Such a big moment went to define Thor's character for the remainder of the film and gave the audience a reason to fear the Mad Titan.

While Loki is known for resurrections, we don't want to see him somehow return from the grave. The reason for this is that it would make his demise seem cheap as a result, as if the massive events of the previous film meant nothing.

18 WANT: AFTERMATH OF THE SNAP

We're not entirely sure where Avengers 4 picks up after the events of Avengers: Infinity War. Some speculation has pointed to the movie picking up a few years after Thanos snapped his fingers. Either way, we would like to see how the world has dealt with the events of the previous film.

How have all the heroes responded to Thanos' destruction? Did Thor go back to Norway to try and rebuild Asgard? Did Tony Stark and Nebula work together to get off Titan? Because Avengers 4 will likely resolve the snap, we'd like to see how it affected the world and the heroes that survived.

17 IMPOSSIBLE: ADAM WARLOCK'S INTRODUCTION

Any fan of the Infinity Gauntlet comic series knows that Adam Warlock was a big part of it. His involvement with the Gauntlet actually helped spawn the sequels to "Infinity Gauntlet" in the form of "Infinity War" and "Infinity Crusade". Despite how heavily Marvel seems to be taking from the comics for the movies, Adam Warlock is not a part of it.

His existence was teased at the end of Guardians of the Galaxy Vol 2, but Marvel has already stated that he most likely wouldn't show up until Guardians of the Galaxy Vol 3 (if that film ever happens). In the meantime, other characters filled his role anyway.

16 WANT: THE NEW GUARDIANS OF THE GALAXY

With Rocket being the only member of the Guardians of the Galaxy to survive the snap, there have been some hints that he'll be part of a new Guardians of the Galaxy team that tries to protect the universe and potentially hunt Thanos down. Briefly seeing a new Guardians of the Galaxy would show the audience how Rocket dealt with losing all of his friends and give him the opportunity to form relationships with other characters.

It's likely that Thor would join this new Guardians team, and he could possibly bring his friends from Thor: Ragnarok as well. Either way, a new Guardians of the Galaxy team would be epic, yet heartbreaking.

15 DON'T WANT: EXCESSIVE TIME TRAVEL

There have been rumors of time travel being a part of Avengers 4 and the plan to take down Thanos. While it will be interesting to revisit key moments from previous MCU films, we definitely don't want the movie to end up as a "greatest hits compilation." An excessive use of time travel would detract from the film's overall purpose.

Viewers would suddenly forget about the overall goal because the heroes are all over time. Time travel is fine, but it needs to be done in a tasteful way that adds to the story. Otherwise, the film could be seen as a major letdown compared to Avengers: Infinity War.

14 WANT: THE END OF TONY STARK

Tony Stark's development since Iron Man has been to protect the entire world. While he doesn't seek opportunities to be a superhero, he is always prepared for the next threat that comes their way. With Thanos' arrival, Tony knows that the moment he has prepared for in the past 10 years has finally come.

However, he lost just about everyone he loved at the end of Avengers: Infinity War, meaning that he's going to come back with a vengeance in Avengers 4. Having been the one to carry the MCU since the beginning, it would be a poetic way for him to lose his life by protecting the Earth one last time.

13 IMPOSSIBLE: ARRIVAL OF THE X-MEN

X-Men-Dark-Phoenix

As cool as it would be to see some of the X-Men join the MCU in Avengers 4, we doubt it would happen. The movie already has its hands full by dealing with the remaining Avengers and their hunt for Thanos. It also has to find a way to bring Captain Marvel into the mix.

With the Disney/FOX deal just going through and plenty of logistics to work out, it would also seem too soon to suddenly throw the X-Men into the film. At best, we would get a post-credit scene at the end that teases the existence of mutants in the world. Don't expect anyone like Magneto to appear.

12 WANT: THE BIGGER THREAT

A leaked toy for Avengers 4 teased that the Avengers would be up against a threat "bigger" than Thanos. Whether this holds true or not, it certainly provides a lot of speculation for the film. With Thanos having won the war, it seems that all that's left is to take him down.

However, it's possible that his actions caused the arrival of another villain that's much stronger and more fearsome. This bigger threat could lead to an impressive final act that warrants all of the Avengers working together. With many possibilities as to who it could be, we're excited to see what Marvel brings to the table.

11 DON'T WANT: THANOS TEAMING UP WITH THE AVENGERS

Thanos Wearing Armor in Infinity War

The whole point of Avengers: Infinity War was to get the audience to despise Thanos. Sure, he had some understandable reasoning, but he wasn't exactly a good guy. Considering he destroyed several characters that we've grown to love over the years, we want to see him finally meet his end at the hands of Earth's Mightiest Heroes.

This is why it would be disappointing to see him team up with the Avengers against some larger threat. Infinity War left on a major cliffhanger so that there could be proper payoff in the next film. Just making him work with the heroes wouldn't feel as satisfying.

10 WANT: OLDER CHARACTERS RETURNING

Age of Ultron Quicksilver dies

Avengers: Infinity War gave us a good look at Red Skull after his mysterious disappearance at the end of Captain America: The First Avenger. We hope that Avengers 4 throws in some older characters as well. Many people talked about seeing Quicksilver again, and rumors have already confirmed that Crossbones will be returning in some way.

With this being the culmination of over a decade of filmmaking, it seems the best time to try and bring older characters back into the spotlight again. It shouldn't be overdone, but there's a real potential to see some faces that we haven't seen for years.

9 IMPOSSIBLE: SKRULL INVASION

Talos with Skrulls on the beach

Captain Marvel is bringing the popular Marvel aliens, Skrulls, to the MCU. That said, we don't think that Marvel would introduce a major race such as the Skrulls is they didn't have any long-term plans with the characters. Whether they're building up a film adaptation of "Secret Invasion" or not, we don't think that the next step would be to throw the Skrulls into Avengers 4.

It would be best to let the Skrulls develop into larger villains and Phase Four and allow Thanos to remain front and center in the film. Marvel would risk crowding an already massive film with too many characters.

8 WANT: CAPTAIN AMERICA'S UNIFORM

Avengers Age of Ultron Captain America

Captain America has gone through a lot of development since Captain America: The First Avenger. Not only did he become disillusioned with those in charge, but he willingly became a fugitive to uphold his own standards. By the end of Captain America: Civil War, he was no longer Captain America.

Now that he has returned to the public eye in Avengers: Infinity War and is going to work with the entire team again, we want to see him wear the star-spangled suit one last time. This is also Chris Evans' last Marvel film, so it makes sense to have him metaphorically return to his old mantle before leaving the MCU.

7 DON'T WANT: NEW AVENGERS INTRODUCED

Nova RIchard Rider

Most Avengers movies have brought new Avengers to the table. The first film properly introduced us to Black Widow and Hawkeye. The second gave us Scarlet Witch, Quicksilver, and the Vision. Avengers: Infinity War didn't introduce any new Avengers, and we don't think Avengers 4 should do it either.

While the cast will be more manageable for a good chunk of the film, the rest of the characters will return at some point. It wouldn't make sense to try and introduce more heroes at the same time. Furthermore, the movie is going to need to spend time integrating Captain Marvel with the rest of the team anyway. There just isn't room for new Avengers.

6 WANT: EVERY AVENGER TOGETHER

By the time Avengers 4 releases, it will have been 11 years since the beginning of the MCU. Since then, all sorts of superheroes have been introduced, and every one of them seems to be appearing in the film in some way. What we want to see is a shot that puts all of the Marvel heroes next to each other with triumphant fanfare in the background.

Marvel was worked tirelessly to earn that shot, and they would be silly not to take it. It's all hands on deck when trying to avenge the Earth, and every superhero needs to work together to stop the Mad Titan once and for all.

5 IMPOSSIBLE: BLACK SUIT SPIDER-MAN

Spider-Man in his Black Suit

With the announcement that the next Spider-Man film would be Spider-Man: Far from Home and take place right after the events of Avengers 4, many have speculated what it could mean. Some wishfully thought that we could see the Venom symbiote latch onto Spider-Man on a different planet and the introduction of the black suit.

However, there's almost no chance that the black suit Spider-Man will appear in Avengers 4. It would be an odd plot point to suddenly introduce, and the rights for Venom are still tied up at Sony. With the Venom film being somehow successful, Spidey won't get that suit anytime soon.

4 DON'T WANT: A FACELESS ARMY BATTLE

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Every Avengers film has had some sort of battle with a faceless army. While Avengers: Infinity War did a bit more to earn such a fight, it's time for the MCU to have a different strategy of using all of its characters in a battle. Thanos has already used his army of Outriders and his Children, so he's going to need to battle them in a different way.

Seeing how the Avengers work together against a single threat would be quite an epic set piece if done properly. It would also give the chance for the movie to stand out against other films. They could even bring back previous MCU villains for an all-out brawl between the heroes and villains of the MCU.

3 WANT: NEBULA WITH THE INFINITY GAUNTLET

Nebula Infinity Gauntlet

Since Guardians of the Galaxy Vol 2, Nebula has been on the hunt for her father, seeking to destroy him for everything he did to her. In the comics, this culminated with Nebula snatching the Infinity Gauntlet and hitting the reset button on the universe, undoing her father's destruction.

If there's anyone who ultimately deserves to deal such a blow to the Mad Titan in the movies, it's Nebula. Furthermore, it could also give explanation to the rumored "bigger threat." Nebula could go crazy with all that power, leading the Avengers to have to stop one last person to save the universe.

2 IMPOSSIBLE: RESET THE TIMELINE

Avengers-MCU

Avengers 4 will have to undo the destruction Thanos did in Avengers: Infinity War. However, we don't think that the way it will be done is through resetting the timeline (that is, changing the entire history of the MCU). We do think there will be serious repercussions at the end of the film, but they'll be more related to the aftermath rather than altering the past.

Marvel has said that there are going to be some serious changes at the end of Phase Three. It will be a new beginning for the MCU of sorts, but that doesn't mean it's going to restructure the entire universe.

1 WANT: CAPTAIN AMERICA WIELDING MJOLNIR

Captain America attempts to lift Mjolnir from a table

This was a moment teased back in Avengers: Age of Ultron. All the Avengers were taking turns trying to lift Thor's hammer, and the only one that got it to budge was Captain America. Considering how selfless and dedicated he has become over the years, it's time for Captain America to have some crazy moment.

While Mjolnir has been destroyed, time travel is a part of Avengers 4. It's possible that the team could somehow grab Mjolnir and Cap proves that he is worthy to wield it. It would be such a crazy moment before Captain America exits the MCU and we would love every second.