Brie Larson has recently revealed that Avengers 5. While the hero's increased strength may sound exciting at first, Captain Marvel is already fairly overpowered compared to the rest of the MCU. Because of this, it will not only be hard to find a villain that would be a match for Danvers, but it would also negate the need for a team in Avengers 5.
First teased at the end of Avengers: Endgame, she is now active once again and ready to help save the galaxy.
Since her introduction, Captain Marvel's power level has always been an issue. She is inarguably the most powerful Avenger in the MCU, meaning most of the series' villains pose no threat to her. Consequently, increasing her strength even more in The Marvels doesn't make much sense. She is already massively overpowered and having her be even more so could serve as a threat to the structure of Avengers 5, as it's difficult to see how working within a team could be a benefit, as she can already take out most threats single-handedly. Having such a potent force fighting alongside the Avengers could make any other participants increasingly obsolete.
It's hard to find a foe that Captain Marvel can't beat. Even when it comes to Thanos, Captain Marvel can easily take down a fleet of ships without even breaking a sweat, as she did when she appeared during the climax of Endgame. Kang was the villain in Avengers 5, Carol Danvers' strength wouldn't make that much of a difference. Kang can manipulate time, meaning he could do things like predict Carol's moves or send an infinite army of Kang variants at the Avengers. Still, most of Marvel's rogues' gallery could easily be taken down by an ultra-powerful Captain Marvel.
The other big issue involves the concept of The Avengers has a diverse line-up in Phase 4, so some characters like Scarlet Witch and Doctor Strange may be helpful to Carol. However, characters like Shang-Chi or an expert archer have no point when one team member has the power of a god. Only having incredibly powerful would prevent the film from being grounded, but having some less powerful wouldn't make sense. Marvel Studios may well find a way to balance it, but issues with things like Captain Marvel's increased power will continue to be noticeable problems in the MCU, from Avengers 5 onward.
