I liked the one mode in MW3 where you had to survive different waves and some waves dropped in Juggs and Dogs and whatnot, I hope there's going to be something like that on there at some point.
I think these games are going in the right direction, and I look forward to future releases of maps and especially new weapons.
Like in Ghosts, I really really like the Ripper and the Maverick AR and Sniper rifle. So when they release stuff like that, I think it makes it that much more worth it for the money we spend on the Extra DLC stuff.