Fundamentally that is indeed always an issue with most Super Villain teams, especially the "all star" ones. LoD, Masters of Evil, ect.
Get Superman, Batman, GL, Wonder Woman, Flash and Aquaman in a room together and despite the egos and personalities involved they at the end of the day want the same thing, to protect the planet from super human threats and to uphold the laws of man and God in some way shape or form, yes, even Batman.
Get Lex Luthor, Ra's Al Ghul, Sinestro, Circe, Zoom and Black Manta in a room together and the elimination of the heroes is about the only thing those maniacs could agree on.
That said... The backstabbing, jockeying and character clashes would be so great to see play out on the big screen with such a group.