It's likely true that Endgame's box office won't be topped for a while, but it has to be acknowledged that their two newest solo properties have also made a buttload of money without either Downey or Evans, etc, names attached, as in Avengers-level money, so the majority of people are obviously still completely on board even if the original 6 aren't in the movies. Which to me is very exciting, since it means we'll continue to get more of what we've seen before + new takes.
Just to be on topic, it's interesting to think that an earthbound Black Widow will not only be (likely) the first Phase 4 movie, but the first movie of a new saga that's been hinted to go wilder and more cosmic (a saga which I really hope will eventually go into stuff like Secret Invasion, Dark Reign, Annihilation, Secret War, etc). Not complaining of course, it's about time she had a movie.
