I'm thinking of the cartoon that has Gambit in it. You know, the Gambit who is the second most popular X-Man after Wolverine (or at least he was back the, I have no idea about now).
And back to your argument about you expect them to be in it as a fangirl because they are so popular. Well there are probably a dozen more popular X-Men that were not in that movie. Its not about popularity with fanboys/girls, its about accuracy.
Based on your popularity idea, then the film would be ok to have the trinity plus the rest of the team being made up of JL Detroit? Would that make it better than the JL tv movie just cause the three tenors were in it?
Justice League the comic has stood without all three of those characters in it, and its only been since the Morrison run that they have "had to" be in the comic.
Some of the most enjoyable issues of JLA featured only one or none of them (the Giffen run comes to mind, which only featured Batman).
I'd say, as long as WW is in it, that would be enough for the average fanboy/girl!
