will kickstart Phase 4 of the MCU with the most ambitious project to date. Unfortunately, the show's innovative format is bound to expire after Wanda's (Elizabeth Olsen) illusion of a perfect life with Vision (Paul Bettany) ultimately comes to an end. However, the MCU could keep using it with other characters and justify their self-awareness in-universe.
Besides his healing factor, Deadpool's most famous superpower is his ability to "break the fourth wall," which means he can interact with the audience and acknowledge the fact that he exists in a fictional universe. This ability let Ryan Reynolds' comedic talent shine in both Deadpool movies, and it was a big part of the reason why Deadpool became such a famous comic book character in the first place. Other notable Marvel characters who can break the fourth wall are She-Hulk (who had been doing it before Deadpool even existed), Rick Jones, Squirrel Girl, and the alternate-reality hero Gwenpool. Several movies and shows in Phase 4 of the MCU prove that no concept is too crazy to adapt to live-action, and this superpower wouldn't be an exception.
WandaVision will reveal the true extent of X-Men universe, but also why he knows he's in a movie.
The Spider-Man movies into one event, why not also involve the real world, just like many comic books have done before?
Considering the MCU's success at interconnecting every single narrative detail, it's unlikely that Deadpool would be completely detached from the rest the multiverse. Apart from WandaVision, Doctor Strange in the Multiverse of Madness will clarify whether Deadpool's meta superpowers are tied to the discovery of multiple realities or if he's just arbitrarily blessed with a unique superpower.