Luke Y Thompson is covering the Con for Deadline:
BATTLE: LOS ANGELES
Should they have called this, BATTLE: L.A., since it was actually shot in Louisiana, and that would provide plausible deniability? Regardless, the look being strived for here is obviously BLACK HAWK DOWN meets DISTRICT 9. Aaron Eckhart leads an army team to find survivors in a besieged Los Angeles that has been bombarded by alien artillery fire. He has three hours to get in and out before the U.S. Military’s bombs drop (implied, but not said in the clip, is that these bombs will be nuclear).