Close Quarters will appear on june, MOP probably around the same.
Im adressing to people that played both style of game.
Which one you will focus more to play on.
I myself quited WoW 5 months ago when BF3 came up and i still play right in this day.
I think im gona go for Close quarters sicne those new maps are the type i like (mano a mano). And also i dont like what i see in MoP with the exception of a few warlock changes. PvP my favorite side of the game will still probably feel the same. Always hated pvp in wow because you cant just go enrage and beat up a pile of dudes while in battlefield with some luck its possible.