I look forward to the BO2 Zombie mode; I loved the first one. And I love the Infected Multiplayer on Modern Warfare 3, too. (As does my brother; it's actually his favorite mode.) As far as the ending goes... I doubt they'll finish in BO2. EA likes to drag things out - make the most out of a series. So I really, really doubt that they'll end the story line only two games in. I expect to see at least four before they consider ending it... y'know.

To be honest.
If there are 8 players for zombies, it will be too easy in zombie mode.
Everyone can heal everyone at the start.

I guess I'll be the first person to say that the zombie thing on COD was overrated. I mean, props to them for FINALLY trying to do something different to make it not just the same game over and over and over and over.......... they are all the same is what i am saying. But I don't think they really did a great job with it. I think the first Left 4 Dead was a far superior first person zombie shooter. Now COD is doing exactly what it always does. Find something that worked the first time, and just do the same thing with a few unnoticeable changes. In this case, it is 8 people. Pretty sure you won't really notice the difference between 4 players and 8 players other than 8 players will make it easier (but I'm sure it will be tiered to make it to where 8 players on this one is as difficult as 4 players on the first). COD knows how to give you the same stuff for years, so you will probably see the zombie thing milked for more than it can give.

CoD Black ops was only a good game because they added zombies to the game but still the zombies mode wasn't even that good to me making me hate this game CoD  should stick with the campaign and the multiplayer Vs.