I honestly was fairly surprised that people thought Watchmen or Kick Ass would do big numbers. Yes, Watchmen is critically acclaimed...but pretty much nobody but comic nerds know anything about the graphic novel. And the graphic novel itself is something not everyone would like. It's a very dark, graphic, take on superheroes. That's not for everyone.
KickAss is similar. A dark, gritty satire on superheroes. Not your typical general public affair. Yeah, it's another Miller creation, but Wanted bared little to no resemblance to it's original source material.
TIH is the one example that I think is misused in this case. TIH had to fight against the very, VERY bad word of mouth spurned by the Hulk movie. That's an uphill battle that was pretty hard for it to win. And it had the unfortunate of being released close by Iron Man and Indy 4. Now, releasing it by Indy 4 was just stupid, because even if that movie had been worse it was going to be huge. Iron Man I don't blame them for, since nobody called that as being as big as it was.