Doubling ? Not necessary, but sell more between september/december in US ? For sure, there is no doubt about that, Halo cant beat exclusive marketing/bundle on COD + Batman + MGS V + AC + Star Wars ( during star wars 7 ! )+ im sure i forgot one.
TR wont be such big deal since everyone knows it will come on PS4.
And Forza is not such big system seller
Predictions for end of 2014 HW sales:
PS4: 17m XB1: 10m WiiU: 10m Vita: 10m