Five years after the release of Avengers: Endgame, I’m still waiting for one major MCU hero to be introduced. 2019’s Avengers: Endgame focused primarily on wrapping up the storyline of the MCU’s original Avengers team, but the Russo brothers’ most recent Marvel Studios project also set up huge storylines for the franchise’s future. Some of these have already been paid off, such as those involving Wanda Maximoff’s Scarlet Witch, Sam Wilson’s Captain America, and Peter Parker’s Spider-Man, but there’s still one that I’m waiting to get some resolution.
https://screenrant.com/avengers-endgame-brian-braddock-captain-britain-mcu/