Mortal Kombat X: Dev Confirms Kratos Won't Return, Comments On Fan-Made PS4 vs Xbox One Boxart | N4G
So apparently it was planned to have the Arbiter from Halo series or the general RAAM from gears of war as Xbox 360 exclusive character just like they did with Kratos from
Mortal Kombat 2011 Kratos gameplay - Video Games Blogger