Leaked from a play tester on the twitter fourzerotwo’s live blog.

http://twitter.infinityward.com/

Here is the leaked information

*Vehicles will be in MW2
*M16 will return, using stopping power will only be OHK at head, neck, and torso (abdomen, limbs, and hands/feet will not)
*Ak47 and M4 will return, unknown if there are any changes
*M40 will return, ACOG damage boost will be fixed
*Scorpion, P90, M21, R700, G3, G360 will not return
*There are more unknown weapons that will not return
*New sniper rifle: SR25M (United states forces)
*New Assault rifle: Diemeco C8 (Canadian forces M4 equivelant)
*New Assault rifle: L85A2 (United Kingdom forces)
*Total weapons in multiplayer are said to be around 35
*Favourite Modern warfare 1 maps will return
*Helicopters, air strikes, UAV will return
*Red dot sightings will come in different shapes for multiplayer (circular, square, original)
*Snipers will have special grass camouflage (As seen in Modern warfare 1’s campaign)
*All perks will return from MW except eavesdrop and others will be altered
*All gametypes will return from MW and all will have hardcore versions
*New gametype: Secure (Call of duty version of capture the flag, however you capture the enemy’s Intel)
*New gametype unconfirmed name, similar to search and destroy, however instead of trying to plant a bomb, you try to kill a specified enemy
*Solider customization for each class (and each country)
*Sniper with silencers will NOT be in multiplayer
*There are NO bots in local multiplayer
*Similar version to Nazi Zombies, however details are unknown
*NO guest players online, 1 player per console
*Killcam save feature
*There is blood and gore
*Offline/Online Co-op
*Story takes place in the Middle East
*Role as US marines return
*Ken Lally voice work in campaign
*Release is set for sometime in November
*New army tags will be available to add different elements in campaign (similar to halo skulls)
*Campaign-only weapons
Apparently the play tester was deleted and banned after posting this, leading many to believe it is real.