Imagine that. "Ladies and gentlemen, you all know Tony Stark..." and there's Robert Downey Jr. "Of course, you know Nick Fury..." and there's Samuel L. Jackson. "I'd like to introduce you to two more of our team members, Thor..." and out walks Chris Hemsworth. "... and Captain America..." and then Chris Evans joins everyone else onstage. "... and, of course, the jolly green giant himself, The Hulk!"
And then some guy no one's ever seen walks out. And he is decidedly not Edward Norton.
Does that make sense to anyone else?