Darth Zangetsu
Super Freak
Well....they are copying marvel on the basic point of they now suddenly see the viability of superhero team-ups* even though it was obvious to anyone with half a brain even before Avengers.
*not counting X-men and Fantastic 4 because those characters existed as a team from the beginning, there was no novelty factor in seeing them all in one movie
They had plans for a Justice League film shortly after Batman Begins. Marvel was not talking about Avegners, at least publicly. The project fell apart when DC rightly pointed out that having another Batman while Nolan was doing his trilogy would be weird. But they had a cast and budget already in place. Marvel did their thing, and it proved very successful. But it is not the only model for success. I am excited for JL. Can't wait to see who else joins the League. Idris Elba for Jon Stewart WB!!!!