Endings don't come much more definitive than Avengers: Endgame, which saw most of the original Avengers lineup dead or retired by the time the credits rolled.
But diehard fans might have a glimmer of hope that they'll get to spend a little more time with Captain America, who is elderly but still alive at the end of the movie. "You never say never. I love the character. I don't know," said Evans in a recent interview — so I guess we can all look forward to Captain America: Getting Mad At Teens Who Tweet "OK Boomer" sometime on the horizon.