User blog comment:Damac1214/Treyarch hints at Black Ops II Multiplayer trailer/@comment-80.180.83.79-20120726075840/@comment-1263839-20120728230709

Compare the World at War DLC to the Black Ops DLC, the multiplayer maps on World at War were made by Treyarch alongside the Zombies maps. In Black Ops, they shipped scrapped maps for First Strike, and Raven Software did the rest while Treyarch focused solely on Zombies. I think it's pretty evident that Zombies and Campaign will just dominate Black Ops II.

On release, Treyarch still released 7 maps (4 copy-pasted maps, but they updated them with new guns/graphics), and they didn't implement in-game bonuses for buying the Hardened/Prestige Editions (which are still the game at-release) that were not to do with Zombies.

Black Ops II will potentially drop dramatically in quality if they focus on Zombies above all else, as I've said elsewhere Dead Ops Arcade was the final Zombies map which is not solely based on pushing the story into accelerate, and thus forgetting about the quality while at the same time making Zombies brand new and just a mixture of Campaign and Multiplayer (a.k.a Horde 2.0 Survival Mode) will also just cheapen it's name.