We're in the final countdown before the Call of Duty: Black Ops 2 release on November 13th, so we should expect lots of leaks over the next few weeks. The latest new information to show up is about the multiplayer "Overflow" maps.
"Overflow" is set in Peshawar, Pakistan and lets you work your way through bombed-0ut back alleys. There's also a "Hijacked" map that takes place aboard a luxury yacht and "Express" that's set in a Los Angeles subway station.
You can watch some IGN commentary on "Overflow" gameplay about and head over to the The Verge for a good explanation of the new Hardpoint mode ("inspired by king of the hill"), improvements to Combat Training to try to convince more players to try online gameplay and changes to the Prestige rankings.