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

New  perks
                         1.Bomb sniffer, Call in a dog to sniff out bomps/explosives.
                         2.Modern cowboy, Dual pistols.
                         3.Dual attachments, call equip two attachments on the gun.
                         4.Speed demon, ability to sprint while prone
                         5.Climber, ability to climb trees
                         6.Slicer, ability to grap enemy from behind and slit their throat.
                         7.MG specialist, ability to dismount MG’s and place them anywhere.
                         8.Underwater trainer, ability to swim under water.