MCU: 10 Possible Uses Of The Multiverse In Phase 4 (And Beyond)
4. A Way To See Deadpool Interact With The Avengers
In his current Ryan Reynolds incarnation, it's really difficult to imagine Deadpool joining the MCU. Not only is his franchise a hard-R, with tons of blood, swearing, and sexual references (while the MCU is a tame PG-13), but his fourth-wall breaking would completely shatter the "realism" the MCU has built up until this point.
Disney CEO Bob Iger has even hinted that Deadpool's films will be released under a separate R-rated banner, and from both a business and creative standpoint (why mess with 'Pool's success?) this sounds like the right call. But the multiverse changes that.
The Deadpool franchise could now be explained as being set in its own alternate Earth, where the rules of reality are different and fourth-wall breaking is a thing. Deadpool 3 could even acknowledge this, making jokes about how the character isn't allowed in the main MCU timeline because he's "too R-rated". Deadpool's reality could even include cameos from his Earth's version of the Avengers, allowing him to interact with Disney's PG-13 heroes in an R-rated setting, without disrupting the main timeline.
Imagine seeing Robert Downey Jr pop-up as Tony, who, in 'Pool's reality, could still be alive. Reynolds could crack one-liners about how his death was emotional and how the MCU always resurrects characters, letting audiences in on the joke. Deadpool could even make fun of old Steve (let's get a scene of him pushing Steve around in a wheelchair!), or team-up with an alternate Spidey to go on a rollicking adventure.
Sure, Disney's Deadpool 3 might have been able to just do all this stuff anyway, multiverse or not. But with the multiverse, at least now there's a genuine in-universe explanation for it all.