When Avengers: Endgame wraps, it'll bring to an end over a decade's worth of movies in the Marvel Cinematic Universe. Starting with Iron Man, Marvel Studios kicked off its Phase One in 2008. Now, the Russo brothers' cosmic epic will drop the curtain on Phase Three -- which has seen war stories, dramas, space sagas, comedies and even the social movement known as Black Panther come to life.

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This leaves us wondering what Kevin Feige and company have in mind for Phase Four. Marvel Studios has been very hush-hush about the future of the MCU, but we believe we have an idea what the blueprint could look like.

AVENGERS OF THE GALAXY

With Thanos proving to be the universe's greatest threat, one thing that's abundantly clear is that the Guardians of the Galaxy and the Avengers will be working towards the same goal. It's not just about protecting one or a few planets, but about policing the entire galaxy. Every Avenger is a Guardian, and vice versa.

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We believe that in Phase Four there will be a greater synergy with various teams spread across the MCU, and that it'll be more than just Earth-focused stories. After all, Thanos snapped half the galaxy out of existence, so it's clear that, across the cosmos, heroes should be uniting. That's why we believe, whether it's Nova (Richard Rider), the Nova Corps or Carol Danvers leading S.W.O.R.D. to monitor Earth and the galaxy, the MCU will be expanding its scope and have an even bigger cosmic slant to it.

Guardians of the Galaxy Vol. 3 was delayed by James Gunn's firing, but what's for certain is that, after Loki brought the Chitauri to Earth in 2012's The Avengers and the Mad Titan came from the depths of space to Wakanda, the planet needs some form of preventative measures to be put in place. Phase Four is the perfect time to really ensure safeguards are implemented off-world so that another "snap" or like-minded tyrant can't throw the universe into chaos again. Plus, we're tired of seeing Earth's heroes at home. Let's see more of them roaming the galaxy and experiencing new cultures and issues, a la Star Trek.

NEXT PAGE: The MCU Will Get a New, Young Coat of Paint

IT'LL LOOK YOUNGER

The likes of Robert Downey Jr., Chris Evans, Chris Hemsworth (and quite possibly Jeremy Renner and Mark Ruffalo) -- with their contracts ending -- are highly likely to say goodbye. We're not sure if their characters will be killed off or retired, but the MCU will definitely be looking at new faces for the next decade of films, at least.

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The baton has already somewhat been passed. It's obvious Marvel Studios is ready to embrace the future, with characters like Tom Holland's Spider-Man and Emma Fuhrmann's Cassie Lang (Scott Lang's daughter) waiting in the wings. Whether it's the likes of the Champions or Young Avengers, the studio needs to connect with a new generation of young adults, teens and kids. The old guard has been around for some time, and they can always return in cameos or flashbacks, but new blood is going to be key moving forward.

Shuri's already a fan-favorite, and it's clear there's an audience who wants to see Miles Morales, Wiccan, Hulkling, Kate Bishop as Hawkeye, Kid Nova or Patriot with Cap's shield paving new chapters. The MCU has to be fresh and relevant, so such an injection is ideal to ensure the stories to come aren't boring and stuff we've seen before. When it comes to heroes, newer and younger models do have an appeal to them, and Marvel Studios does have a dynamic array of characters to choose from. It won't be an easy transition, but, speaking from experience, we know we can trust the MCU to pull this off.

IT'LL BE MORE DIVERSE

Black Panther T'Challa and Shuri

Diversity and inclusion started to gain momentum with Black Panther, but it's going to be soaring to new heights with Brie Larson's Captain Marvel. She's said to be the new face of the MCU, and as the first female superhero in its timeline, we can already see her bringing the "woman power" and inspiring women worldwide at a time where feminism should be recognized fearlessly and rewarded.

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Sure, we've had Black Widow kicking butt, but rather than being a supporting player, the MCU is poised to start making women the centerpieces of narratives. Even if it's a solo film going back to Natasha's origin, another sequel with Carol decades after the '90s, focusing on Hope van Dyne as the Wasp or detailing the life of Kamala Khan, Feige and his creatives know that, after the male-heavy look of these first three phases, it's time to shift things and let the women take up more of the spotlight.

Also, with Black Panther's success, it's not just about people of color in front the camera, but behind it as well. That film has been claiming awards, getting tons of nominations and, as director Ryan Coogler wanted, it's helping to change the industry. Whether it's more Wakandan stories, diving into the adventures of Shang-Chi, Amadeus Cho, Red Wolf, Kamala or Miles, people want to see characters they can relate to. Into The Spider-Verse reminded us that heroes come in different colors and sizes, so with it also becoming financially successful and critically acclaimed, we're already expecting Phase Four to add vibrancy and really adopt a new approach to things by incorporating more heroes of color.