I Got ps4 before the deadline , but I bought the hard disc for ps4, just because I like have a disc for it. All stats carried over yes, but onslaught dlc didn't carry over for me. Also, I bought a camo on ps4, and I played a little on ps3 while in bed, and the camo didn't transfer back to the ps3. ( I'm not sure if it is suppose to or not ). Hope this helps.