There's been a lot of speculation about those desert set scenes we've seen in the trailers and TV spots for Batman v Superman: Dawn of Justice, but the latest issue of Empire Magazine has now confirmed that it is indeed a dream sequence and not a flashforward to the Justice League movie of anything like that. Why exactly Bruce Wayne is having nightmares about Darkseid and his Parademons is hard to say (there's no mention of them in the magazine, but the villain's logo has obviously been spotted in a new still, while those winged creatures showed up in the latest trailer).
The magazine goes on to confirm that it takes place in the fictional nation of Kandahar, with "Batman...shouldering a machine gun, walks unbowed through the blizzard to greet an armoured juggernaut pulling up in a desert compound that's walled with rusty containers." They also describe the entire sequence as "pure Mad Max", but don't shed any light on what Darkseid might have to do with it or why Bruce might be having premonitions of his impending arrival on Earth.
More interesting Batman related reveals to come from the magazine include executive producer Deborah Snyder confirming that, "Batman's voice is digitally altered by the cowl." That's pretty much what we all suspected after that recent TV spot, and this is a surprising direction to take things in after the way previous Batman movies have handled the voice situation (it's also pretty close to what Oliver Queen does in Arrow, oddly enough). Anyway, it's also mentioned that the Caped Crusader's foes are locked up in Arkham Asylum and that Jeremy Irons' Alfred Pennyworth is a butler "when required", but will actually be a lot more "hands-on" in this movie. He also has a special-ops background.
So, some interesting stuff here, but for more, be sure to pick up the latest issue of Empire!