Well the same could have been thought of putting Chris Hemsworth alongside Anthony Hopkins, who is clearly in another acting league. And yet, it didn't happen that way. Nor did that happen with other films where the lead actor was less known, like Superman, for instance. But anyway, I wouldn't really want Matt Damon as Mar-Vell personally. I'd like someone a bit more imposing and taller in the same height region as Evans or Hemsworth.