Soundwave on 19 September 2012
I think BLOPS2 will sell for a long time with the Wii U too, well into 2013.
Really after Mario (assuming most Nintendo Land's are going to be bundled) ... I think most people will turn to BLOPS2.
Never underestimate consumer thinking either, honestly sometimes I've bought games (which weren't bad games mind you) more because I wanted something new to play on my shiny new system. When people get a new game system they tend to load up on the games.
Plus I think being able to play console-perfect CoD (sorry Vita) in your bed or on the pooper (lol) or on the porch has a certain appeal.
