Halo 4 + CoD with a hint of GoW.
I still think Battlefield 4 is a better choice for a fps. The Call of Duty franchise got old after the first Black Ops and they haven't really came up with anything really new or intriguing.
they need to start working on WW2 games againthat'd be pretty cool
they should make a COD game that takes a page from spec:ops the line where you're in saigon and iwo jima and it's a really anti-war sorta game