With the original Avengers team largely departing the MCU, the team will need a new leader in Avengers 5 and the perfect hero would fix past MCU mistakes. Marvel's premiere super-team is in need of leadership and the best candidate has been there, largely wasted since Phase 2. Phase 4 of the MCU marked the end of an era. Now the MCU is moving in new directions, exploring new characters and new ideas such as a teased MCU Secret Wars storyline. However, there are still several established characters and ideas that haven't quite gotten their proper due, either because they were overshadowed by the Avengers or simply introduced to the universe too late to really be involved much in events. One of those characters is Hope van Dyne, aka The Wasp.
Introduced in 2015's Ant-Man, Hope van Dyne is the daughter of Henry Pym and Janet van Dyne. When the decision came down to adapt the Avengers property, Ant-Man was left off the table due to a longstanding controversy around the character that took root in the early 1980s. Because of that decision, the Wasp was also left out of 2012's Avengers. However, the Wasp is a staple of the Marvel Universe in the comics and the Avengers in particular.
Related: MCU Phase 4 Repeats Avengers' Wasp Snub (& Makes It Worse)
The Wasp has unfortunately been wasted in the MCU due to the timing of her introduction, but this could still be salvaged by not only making Wasp a proper Avenger, but the eventual leader of the Avengers. It would certainly be consistent with the Wasp's role in the comics. Furthermore, it could be done in a natural way that directly expands on the arc she's already had throughout the Ant-Man movies.
The Wasp is a character with a long and illustrious history among the Avengers.
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