The following maps will return for BF 4DLC 1 China Rising will include Wake Island, because we really need this massively imbalanced map in a battlefield game for the 15th time, and Songhua Stalemate because it will be quick for DICE to re-make. DLC 2 "Second Assault" will include Metro, Caspian Border, Grand Bazaar and either Seine Crossing or Damavand Peak.
There will be a map in Yosemite.One of the landscape◊ shots released looks rather like El Capitan.
The reason why the Russians are fighting the Chinese in multiplayerThe Chinese forces that the Russians encounter are a splinter faction of the PLA that supports Jin Jie. Presumably, Admiral Chang's faction, which is concentrating on fighting the American invasion of the coast (All the USA vs Chinese maps take place either in urban centers or islands along the coast) requests support from the Russians, whom they are allied with in the campaign, to deal with the insurgents in the interior of the mainland.
The nuke at end of battlefield 3 actually went offIt was on a timer, exploding seconds after Blackburn reached it. This explains why Russia and the US are at war; the evidence, witnesses and the two people who knew were at ground zero of the nuke, which also explains why Blackburn didn't make an appearance in Battlefield 4. Kovic's survival was due to the distance the train covered when Blackburn was on it, meaning he was outside the nuke's blast radius.