Yes I will buy it and so will 80% of the current COD community for 3 easy reasons:
1. It's a relatively fun and addictive series despite how we complain.
2. The idea that "the next COD will be better and maybe close to COD4/MW2 levels.
3. It will be on next gen consoles which adds increased value and intrigue.
I'll definitely be buying it and worst case play it until Battlefield 4 comes out and then check it out.