I do believe the multiplayer is going to have a few small changes to make it feel new and fresh... Like a 2 hit knifing system. Or a 1 hit with a perk. That would be a big help if it took place of something like hardline, assassin, or slight of hand
The thing is that it's going to look different on the exterior. But the probability is that it'll probably play the same as every other call of duty out there.