PC Gamer has official word from DICE that there will be no modification support in Battlefield 4, though at this point, we have lost any expectation for it in this military shooter series. Karl-Magnus Troedsson tells them flat out "we will not have mod support in BF4." He says this is still something they are considering for the franchise moving forward, but talk is cheap, and paying to add support that might leach DLC sales is expensive, so we're not getting our hopes up.