I hope theres something innovative in the multiplayer. Another MW will be awesome, i hope the single player is as good as the first but I will probably not buy it if they just redo the cod4/waw multiplayer. Its time for them to come up with a new brilliant system or at least make some significant adjustments or changes.
OK, i have found out this from a clan member:
Below is what i have found out so far.
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
New army tags will be available to add different elements in campaign (similar to halo skulls)
Campaign-only weapons