I'll again point out I don't think F4 are popular to the general public. My wife, who does not watch many Marvel movies, legit had no idea who they were. And I mean nothing, no idea on suits, powers, etc. Very anecdotal I know, but point is, she knows Jurassic Park, and she knows Superman. If you only plan to drop $150 this month on going to the theaters, people are probably picking the one they know. And if part of it is which kids are going to pick, I'd argue the same thing. Thor, while not the greatest movie, was a character most of the general public knows at this point, and didn't have to battle for ticket sales with other big movies (I don't think, don't quote me on that one).