Firaxis has revealed in an interview with Edge magazine that the studio has taken inspiration from how manga has been captured in anime, and subsequently games.
Art director, Denis Moellers, says in the #363 edition of Edge Magazine that one of the key focuses for the team was how to translate these comic-book Marvel characters to a fully animated game. Moellers specifically references how anime is able to translate these amazing comic-book poses into animation and that Midnight Suns uses the same philosophy for superheroes Heroic attacks animations, like Captain Marvel delivering an uppercut with glowing fists, Doctor Strange opening the Eye Of Agamotto, [or] Nico sprouting wings of black energy.
Source: N4G PC Dragon Ball FighterZ was a big influence on Midnight Suns animations and combat