Between Captain America: Civil War and the four Avengers films, the Marvel Cinematic Universe has adapted some of the most iconic storylines in the history of the comics. However, Marvel Studios hasn't even begun to scratch the surface, and there's still a lot of storylines that need to make their way to the cinematic universe. We've compiled a list of fifteen we want to see happen in Phase Four.

We're starting out with one that was potentially teased in Endgame. Early in the film, Okoye talks about an underwater earthquake. Although it doesn't seem like a particularly big deal, it might hint at the introduction of Namor the Sub-Mariner. In the comics, he flooded all of Wakanda, and it's possible he might end up playing a villain in that film.

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Check out the video below for more storylines the MCU needs to adapt.

As death appears to be a lot more permanent in the MCU than in the comics, there are a lot of different storylines that would need to undergo some pretty major changes following the deaths in Endgame. Still, there's a lot of material, and the MCU has done a good job so far of adapting different iconic stories.

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Directed by Joe and Anthony Russo, Avengers: Endgame stars Robert Downey Jr. as Iron Man, Chris Evans as Captain America, Mark Ruffalo as Bruce Banner, Chris Hemsworth as Thor, Scarlett Johansson as Black Widow, Jeremy Renner as Hawkeye, Brie Larson as Captain Marvel, Paul Rudd as Ant-Man, Don Cheadle as War Machine, Karen Gillan as Nebula, Danai Gurira as Okoye and Bradley Cooper as Rocket, with Gwyneth Paltrow Pepper Potts, Jon Favreau as Happy Hogan, Benedict Wong as Wong, Tessa Thompson as Valkyrie and Josh Brolin as Thanos. The film is in theaters now.