"Here is some leaked Black Ops 2 information from an industry contact at Activision. Although he is just an associate producer, he has been telling me all about the game. This information is 100% correct, and verified., and I will not reveal my friends name. He doesnt even know I am posting this. I will provide no other details, as I do not know anything more than this, so please do not ask.
Multiplayer
You can now make a class based on how much equipment you have, rather than having to choose stuff you dont ever use. For example, it is possible to have 6 perks if you choose to not carry a primary or secondary weapon (you will have just a knife). If you choose to pick a primary gun, it will say you need to replace one of those perks. If you dont like any perks, you can add more features to your primary or secondary. Live Streaming Black Ops 2 will now have a live streaming feature built right in. You can automatically stream your gameplay over the internet easily. You would require a camera though for the feature that shows your face. This may or may not work with Kinnect.
Dedicated servers Black ops 2 will now feature deticated servers, so now you wont have to worry about host migrations when someone leaves the match.
Some primary weapons Assault Shield Same as the riot shield in MW3, but can be placed on the ground standing up, so it can give the player some cover while using their other weapon.
SCAR assault rifle
Vector K10 SMG
Ballistic Knife
AS-50 sniper rifle
MP7
Storm PSR Shown in the E3demo.
Crossbow with explosive tip
Note: There are no noob tubes (grenade launchers) in this game
Some Secondary
SMAW
Five-Seven
Barreta burst pistol
RPG with an updated futuristic look
Stinger Missile
Some Multiplayer levels
Cargo / Dockside Play through a Singapore shipping yard. Same as the strikeforce mission in single player Aftermath Play through some ruins of Los Angeles. Hijacked A close quarter map that takes place on a Yacht. Slums Play though slums in panama. Drone Play through a complex with docked aerial drones. Power plant Play through a Pakistan power plant. Nightclub Play in a nightclub from the Al Jinan single player campaign . Overflow Takes place in Pakistan on in a business district. Carrier Takes place on an aircraft carrier U.S.S. Barack Obama from single player. Turbine Takes place in Yemen in a valley with crashed windmills. Yemen Takes place in suburban Yemen with close quarter buildings.
Lethal Grenades Frag Claymore Combat Axe Same as the tomahawk in Black Ops 1.
Tactical Grenades
Flash Smoke EMP Concussion Tazer Spike An electronic device thrown on the ground or the wall. If an enemy walks over it Tactical insert
Killstreaks
UAV Standard COD killstreak Care Package Standard COD kill streak RC-XD Same that was in Black Ops 1. Remotely control an RC car with explosives on it. Microwave Turret Place this on the on the ground to trap enemies in a wave of microwave energy. If the enemy is in it for too long, they die. Death Machine - Same killstream from Black Ops 1. Hellstorm Missile Same to the Predator missle in MW3, except it can deploy a cluster bomb before impact if the player wishes. Multiple grenade launcher A rapid fire grenade launcher. QR Drone Control a quadrotor, flying through the map, shooting enemies. AI Tank Similar to the assault drone in MW3 Sentry Gun Your typical COD sentry gun. Can remotely control it. Orbital VSAT Similar to the Advanced UAV in MW3, but cannot be shot down, and has the enemies painted on minimap. Their position and directional information is shown in real time. Single Seeker Drone Launch a single seeker drone that flies into the air and seeks out the nearest enemy and kills them. EMP Same as in MW3 Helicopter gunner Control a helicopter gunner. Includes feature to move across map when player wishes to change position. Lodestar A plane that flies over the map. Player can control it shooting rockets down at the enemies. Helicopter escort Have a helicopter that follows you from above, shooting enemy players. Attack Dogs Same kill streak from Black Ops 1. Drone Swarm The top killstreak. Call in a swam of drones overhead that will seek out and kill enemies.
Perks Ghost- No information Fast Hands Swap weapons faster and throw grenades faster. Dexterity Climb obstacles faster Lightweight Either run faster, or run longer.. not much info on that. Flak Jacket Same as in Black Ops 1. Tactical mask Resistant against flash bangs, concussion grenades, spikes, emp grnades Cold blooded No information
There is no last stand perk in the game.
Zombies. Not much information was given, however, here are a few bits of info. New Feature Player can get infected turn into a zombie, and play as a zombie, attacking other players. The zombies hands are in first person mode while you swipe and claw other players.
Modes
Meat
Locations Diner Farm
Weapons Tesla gun
Other Danny Trejo returns to voice a character in Zombie campaign mode."
. They pulling the same stunt with bo2. 
That multiPlayer