Well,i have been checking if there will be new game modes and i found that there will be im not sure if these are confirmed but they seem legit to me
(click on the photo so you can see)
Well this sounds like fun, but it would be nice if the devs looked inside this thread and maybe made one of these game modes I really loved Clan Arena in Quake Live. It always makes a nice mix - a large war slowly turning down into a duel or seeking a camper Besides this, in CA every person was given every weapon with full ammo and a double HP, so that the battle doesn't end quickly - here in CoD it could be e.g. 1.5x HP (or double, or even 2.5x, whichever setting makes most fun), full or even double ammo for your weapons, and two or three frag nades (no mater what perk you use).
Frag nades would be balanced by increased health, huge ammo balanced with no respawn, and the killstreaks of course - these could be of course made available, but once you start controlling e.g. a predator missile, the enemies can take you down easier and get closer to win the round