Just read this about the gameplay on Black Ops 2, sounds really interesting to be fair...
I'm really looking forward to it now. The new zombies sounds much improved and will hopefully return it to what it was originally, a good crack.
And I've always felt the campaigns were far more impressive than the MP, but have understandably (and sometimes blatantly) felt a little on rails. Strike force mode sounds like it could break that up nicely, but without leaving it pointlessly open.
And for the record, after Modern Warfare I thought World at War was the most enjoyable episode.