Read The Script From The Scrapped 2007 ‘Justice League’ Movie
DC and Warner Bros. seem to be gearing up to build a cinematic Justice League, but the whole thing almost happened much more quickly back in 2007.
The companies did pre-production for a Justice League movie that got to the script and casting stages, but not much further. The script has now reportedly surfaced online.
If you don't feel like downloading it here., it's basically an adaptation of the OMAC/Brother Eye storyline from Infinite Crisis with a little bit of the tragedy of Crisis on Infinite Earths mixed in for good measure. At the risk of editorializing, it's pretty melodramatic, opening on a funeral we're led to believe is Batman's but which turns out to be (spoiler for a movie that never got made) Barry Allen's. There's some pretty bad dialogue, too. (Batman: "I have one weakness. I'm human.")
Still if you want to imagine what this script that comes from the days of the mid-2000s writer's strike would have looked like on film, the casting was done: It would have starred Armie Hammer as Batman, Megan Gale as Wonder Woman, D.J. Cotrona as Superman, Adam Brody as The Flash/Wally West, Hugh Keays-Byrne as Martian Manhunter, Teresa Palmer as Talia Al Ghul, Zoe Kazan as Iris Allen, Santiago Cabrera as Aquaman, Jay Baruchel as Maxwell Lord, and Common as Green Lantern.