“If you’re going to have a midlife crisis,” Wade Wilson’s best buddy tells him in an early scene of Deadpool & Wolverine, “Make it big.” This is perfect foreshadowing for a movie predominantly set in a Mad Max-style fantasy world, featuring at least 100 murdered corpses in the climax, and delivering jokes with unchecked aggression. But it isn’t just Wade who’s in a bit of a rut right now, it’s also the Marvel Cinematic Universe. The world’s top-grossing film franchise has been struggling to match its early success recently, while…