The inspiration behind this video:

While Deadpool does not immediately stand out as a perfect candidate for the Avengers, it would make his MCU inclusion much better. With Deadpool 3 continuing the character's story in Marvel's Phase 6, it is safe to assume he will be a big part of the overarching story of the MCU's Multiverse Saga, given his transition from one universe to another. Also, Deadpool 3's place in Phase 6 is surrounded by Fantastic Four, Avengers: The Kang Dynasty, and Avengers: Secret Wars. This points to Deadpool 3 being potentially more important than other films to the MCU's second saga, or even its third going into Phase 7.

This importance could be realized through Deadpool playing a part in Avengers: The Kang Dynasty or Avengers: Secret Wars. Perhaps not as an official member of the team, Deadpool could be used akin to how the Guardians and Doctor Strange fit into Avengers: Infinity War and Avengers: Endgame, as these were characters who helped in the fighting but weren't official Avengers members. Regardless, putting the Merc with a Mouth in Avengers 5 would make Deadpool's MCU inclusion feel more natural if he were to be part of the overall story, rather than more of a spin-off franchise the Deadpool movies were treated as at Fox, something that could be seeded in 2024's Deadpool 3.

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