Kevin Feige confirmed Deadpool 3 will be in the Marvel Cinematic Universe and be one of the first R-rated MCU films. While some MCU content, such as the Netflix series, have explored darker territory, this shows a willingness for the whole of the MCU to go to new places.

It is unlikely Marvel will greenlight R-rated films for pre-existing characters, but there are others who could benefit from being R-rated if or when they enter the MCU. There is also one pre-existing character who could be an exception for Disney and Marvel.

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Wolverine

Wolverine-with-Metal-Claws-header

After the incredible success of Logan, an R-rated film featuring Wolverine seems like a no-brainer. Wolverine's visceral fighting style lends itself well to R-rated stories. While Wolverine stories have worked on film without the R-rating, it's hard to go back after Logan reinvented the character for the screen.

An R-rated Wolverine film in the MCU could showcase the mutant's extreme regeneration abilities, making them as bloody and brutal as possible. On top of that, if the Weapon X process is reinvented for the MCU, audiences could see the painful and sadistic medical experiments played out in their entirety -- a stark contrast to the experience Captain America underwent.

Blade

Blade the Vampire Hunter jumping into battle.

Aside from Wolverine and Deadpool, Blade is the other Marvel character who successfully had a hit R-rated film, and with the character planned to enter the MCU, his next cinematic appearance should be R-rated as well. Blade centers around vampirism, and while it is possible to do vampires without reaching an R-rating, the sexually-charged and bloody affairs of vampire hunting lend themselves more to R than PG-13.

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Blade is a series that involves plenty of limb chopping, stabbing and violence. The original Blade films used blood effectively -- most notably with the rave scene in the first movie. However, when the MCU brings Blade back, it might have more opportunities to showcase the bloody horror of vampires in Marvel's universe. This is especially true if other monster characters, like Werewolf by Night, are incorporated.

Ghost Rider

Ghost Rider from Marvel Comics

While Ghost Rider can work outside of the PG-13 rating, it might be hard for Marvel Studios to explore visions of hell and eternal damnation without featuring a little gore and blood. The monstrous imagery latent in Ghost Rider would feel censored in a PG-13 movie. A Ghost Rider film should feel more like a heavy-metal Hellraiser movie, complete with depraved humans and repulsive demons.

Ghost Rider can afford to feature gorier fights throughout. For instance, he smacks demons with a chain, which does not leave a clean, open wound. The violence, along with the fact he is powered by hellfire, can make Ghost Rider a genuinely threatening character rather than just a cool superhero.

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Moon Knight

Moon Knight Marvel

When Moon Knight comes to the MCU, played by Oscar Isaacs, he needs to be R-rated and brutal, especially if he makes the move from Disney+ to the films. Moon Knight is capable of unleashing ferocious acts of violence upon all who stand before him.

Moon Knight's mental health is something that could also be relayed in a compelling fashion in an R-rated film. In the comics, he has delusions surrounding his meetings with the god Khonshu, and the MCU should not hold back when it comes to representing this. Having an R-rating means the filmmakers wouldn't be restricted when it comes to depicting the god or Moon Knight's struggles with mental health.

The Hood

Arguably the least mainstream character on this list, Parker Robbins, a.k.a. the Hood, was introduced at the start of the Marvel MAX line, the same line that ran adult-centered content focused on Blade, Wolverine, the Punisher and many others. The Hood gained his powers after stealing a cloak that belonged -- unbeknownst to him -- to a demon empowered by Dormammu.

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The Hood is a straight-up antagonist, often making morally questionable decisions in the pursuit of achieving his dream of being a supervillain. This makes him a compelling and unique character; however, as seen with Daredevil and Jessica Jones, it is hard to explore the criminal underworld in a sincere way without going all-out.

Bonus: The Immortal Hulk

Marvel Comics Hulk and the One Below All

The Hulk is one of the established heroes of the MCU, being played in tons of family-friendly films. However, a film that adapts the events of The Immortal Hulk would be incredible to watch. The comic centers itself on how the Hulk, as the title implies, cannot seem to die, but it also digs into Bruce Banner's psyche and ties to Marvel's hell.

The Immortal Hulk could fit into films centered around any number of other characters mentioned earlier, like Wolverine or Ghost Rider. Regardless of how it happens, The Immortal Hulk would be incredible to see on the big screen, but it may be all but impossible to convince Disney to turn one of its biggest icons into one of its biggest sources of fear.

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