Thanks to the straight-to-home video Flashpoint movie, the new animated universe based on DC's New 52 relaunch is officially here. The first movie in this brand-new DCAU? Justice League: War, based on the first six issues of the Justice League comic by Geoff Johns — here's the trailer.
In War, Batman, Superman et al. come together when Darkseid invades Earth from Apokolips, although the heroes doesn't immediately get along, as you can see. I have no idea why Wonder Woman is dressed like that, because that's definitely not her New 52 outfit — it's certainly no more practical that her normal costume, although it is kind of cool.
The movie will be released next year. That's Alan Tudyk as Superman, by the way.