wary-wallaroo on 06 March 2014
I very much doubt MS is capable of actually delivering anything mind blowing. They don't have the first party capacity to do so, so it'd have to either be a second party exclusive (and I can't think of any second party devs that would be huge) or another money hatter third party exclusive (which given PS4 sales and it's prospects, it's unlikely any publisher will want to miss out).
It'll likely just be more of the same, another Halo or Forza or something.
