We were told it was the intention of the producers to rehire everybody if the film ever came back to Sydney... but i think it was a pretty empty promise as the chances of that happening were pretty slim even then.
I think it's HIGHLY unlikely to be made with George Miller, that story, those actors etc. I think they're reassessing the whole project altogether.
I can tell you that there was definitely no Hall of Justice - it was an origin movie, they didn't really join officially as 'The Justice League' until the very end of the film.
There were a lot of scenes in the Batcave, Fortress of Solitude (including a replica of the Kent Family Homestead that Clark had built there), Wonder Woman's house, Aquaman's underwater throne room, Barry Allen's house, Maxwell Lord's mansion/headquarters...
I did see all the costumes! They had pretty much finished them all when the film got canned. They looked great. Superman's was very stylised - all blue except for gold belt and red cape, which had red Kryptonian lettering etched into its fabric... almost like a digital print along his arms, like electronic data. and his belt was gold and had fine detail that told the story of how he landed on earth.
Batman's suit was very bulky, more like a soldier, not as sleek as Chris Nolan's.
Batman was all black - like i said, kind of like an army/special ops sort of thing. very bulky and solid and practical. he carried tools on his belt, gas grenades etc. not as futuristic or sleek as the nolan one.
I dunno where this came from (looks like concept art from the joss whedon wonder woman movie maybe? or fan art?) but it was pretty close to this*:
(*He posted a mock pic of Cobie Smulders as WW made by jmc)
This looks very much like the WETA mockups I was sent (except it was megan gale of course). Maybe the JLA one was slightly less armory, but the leather look is pretty close. and the bodice looks close to what i saw. There was detail in the belt that had symbols that i think were greek. It had this same greek warrior look, very realistic. No cheesy stars or spandex etc.
Aquaman had the modern look - long hair, green scaly tights, golden armor, but assymetrical, so his left shoulder was exposed. His left hand had a harpoon attachment.
Flash was very classic - full red bodysuit, flash logo on chest, runners - basically just like this alex ross pic* except imagine adam brody (and the golden ear wings were smaller, and went straight back instead of outwards)
(*He posted a pic of Alex Ross's Flash )
Yeah I remember MMH... he was going to be played by Hugh Keays Byrnes, the guy that played toecutter in Mad Max. They were building prosthetics for him. Basically he was the classic look - all green like you would expect, with the red leather braces across his chest. Can't recall if he had the cape though, I think he did.
MM was just a guy in prosthetic yeah - CG only when he flew/fought I think...
Green Lantern was going to be played by Common - it was the John Stewart version. Again, pretty much what you would expect his costume to be. It was mostly black with a very dark green detail. Logo on chest. They were playing around with a few different rings too.