So with the mod tools coming out (and since BO3's engine has a lot more capabilities than WaW's engine), I would assume that people can now make bigger maps than the highest limit that WaW allows you to make.

However...just how big can these maps be, exactly? For MP, will it be big enough to be able to create, say, one of those huge surf maps that Valve Source games have? And what about Zombies? There are a few game locations that I would've loved to see as a zombies map in WaW, but it probably wouldn't be possible due to engine limits...would it be possible to put it in BO3 and perhaps make it bigger than it was before?