Well, they are definitely holding back on some things per stage or we're seeing double. This trailer shows the Superman statue on the globe again, which has only been seen once; and on that same stage only once have we seen up until this new video, which has again both versions (with/without)

Maybe there's an alternate version of each stage (I'm sure it's not 2 complete separate stages like MvC3 did), one with everyone still alive (with Superman statue), and one with everyone except the fighters dead (Superman is evil in this one and that's the one with the guy that shoots the machinegun in the background if u get near him); that would make an odd but interesting twist on this game's story/functions. That could possibly mean that Flash could fix it all by going back in time. I don't know if what I'm guessing is true but I do agree that we need some really awsome stages to go with this EPIC game: Atlantis, Oa, Arkham Asylum, Gotham City, Star City, Flash's Museum, Injustice Swamp Headquarters, Hall of Justice, Apokolips, New Genesis, Korll, Titan's Tower, Theymscria, Thanagar, Aeaea Island, Lazarus Pits, and Ivy's Botanical Garden.

I'm guessing that the new stage is the Watchtower (control room), again we need to see the hydroponics and aquarium areas for the 2nd/3rd levels.

So far I've feel the stages all look a little too similar to each other, and the Metropolis stage feels a little uninspired. I'm reserving my judgement until I see the final product, because the stages are supposed to be one of the main selling points for this game, and I loved the stages in MK9.

Well they might do the same thing they did in MK(2011) with a couple of the same stages being slightly altered(rooftop day/dawn the pit dawn/night). But they might not,now that i remember that the stages are going to be interactive,i mean they could,with somewhat different interactions.