343 are set to update Halo 4 on Monday, and on top of the next episode of Spartan Ops, two new Specialisations are being to be unlocked.
Rogue and Tracker are the two Specialisations in question, and they'll be joined by new Doubles modes. Straight up Infinity Doubles is joined by a Capture the Flag mode for two, and there's also a Doubles Pro mode, and that'll feature preset loadouts. Head this way for more details of the two new Specialisations and the Doubles Pro line-up.