PS4's success being owed primarily to multi-plats and not having much of a horse in the holiday race, I think their exclusives end up being last combined.
I think Smash and Master Chief Collection will sell relatively similar amounts lifetime. That said, Halo has a black friday advantage whereas Smash may not even launch until the week before Christmas. As great as the rest of the WiiU lineup is, they're all dark-horse titles sales wise. Forza Horizon 2 has an advantage in being multi-plat on a system with larger userbase -- if count it's 360 sales in the bunch...
Advantage: XB1
I predict NX launches in 2017 - not 2016











