Variety reports that Warner Bros. has put the JUSTICE LEAGUE movie on indefinite hold. The writer's strike was a factor, but not the only one, according to the article.
Fortunately, this is a fairly young and unknown cast. They'll make time for JL whenever it is ready to go, because it could make their careers.
Until then, it means Warner Bros. has a gap in the 2009 slate, and uncertainty surrounding the next SUPERMAN movie.