I didn't even know there was a CoD7... or 6, or even 5 for that matter... the last numbered one I remember was CoD4 o.O
Let me give you a little insight... MW2 is not CoD6, it is a sequel to CoD4, and since WaW isn't numbered, it obviously isn't CoD5, and if that were so, then actually, this CoD7... aka the real name; Vietnam, would be like... CoD11 or something, look at the games on the PSP, and the Treyarch games on the PS2/XBOX (Finest Hour, Big Red One), and even United Offensive (Although that's an expansion pack, but worthy of being a full game)
And if you question that, let me ask something else... why isn't Final Fantasy X-2, considered to be Final Fantasy XI (11)? I mean, it's another Final Fantasy game, right? It's a sequel, just like MW2, yet you don't treat it in the same way, why is this?
Anyway, enough of my rant, I'll do that later, maybe in my own thread...
I'll be getting Killzone 3, since Killzone 2 is one of the best shooters I've played to date, and not a single Call of Duty has come close to how epic it felt while playing, especially while online.