Just stumbled across this pretty cool bit of photo-art online. Some of this doesn't really work anymore since new folks have been cast, but I kind of like it.
source:
http://fc09.deviantart.com/fs47/i/2009/194/4/4/Justice_League_Movie_Manip_WIP_by_TimDrakeRobin.jpg (http://fc09.deviantart.com/fs47/i/2009/194/4/4/Justice_League_Movie_Manip_WIP_by_TimDrakeRobin.jpg)
I take it the "guy" on the far left is supposed to be the Martian Manhunter? It would be cool for them to make a movie about the JLA. I know there was other things before but hopefully they will make one. Some day.