I think XB1 will generally hold the lead. It's possible during the quiet season 2015, if Wii U gets a major title and XB1 has nothing then WAii U > XB1.
I don't really expect it for 2014. XB1 is handily ahead in October, and November will be a huge month for XB1 with Sunset, Halo MCC, COD, AC:U, FC4, Dragon Age.








