Overall game aspects:
The game will be developed by Infinity Ward, co-developped by Sledgehammer Games and published by Activision
The game will launch worldwide on November 8th, 2011 and will be available for the PC, PS3 and Xbox 360
MW3 will be, just like MW2, locked at 60 FPS meaning it will never go below (but can of course still go over)
MW3 will run on an improved version of the MW2 engine
According to IW, console equality is very important.
Dive-to-prone is not returning.<3
MW3 weapons have considerably larger recoil than weapons in MW2.
When reloading an emptied pistol, the slide is pulled.

Campaign:
MW3 is a direct sequel to MW2
MW3 takes place during WWIII.
Confirmed locations are New York, London, Paris, Berlin, Russia, Africa and the Himalayas
Breaching doors is returning.
There is no Co-op
Known characters : Derek "Frost" Westwood, "Sandman", Michael Burns, John "Soap" MacTavish, Nikolai, John Price & Vladimir Makarov
Confirmed playable characters : Derek "Frost" Westwood and Michael Burns
Known Campaign missions are : "Black Tuesday", "Mind the Gap" and "Hunter Killer".
Known factions are : American "Delta Force", British SAS, French GIGN and possibly American Navy SEALs
Black Tuesday : This level is played by Delta Force operators. It takes place at the New York City Stock Exchange. The title is a reference to the Wall Street Crash of 1929. You basically fight your way to the NY Stock Exchange, and plant a Thermite Charge on some sort of satellite located on the roof. The level ends with an epic gunship battle where you take control of the minigun mounted on a Black Hawk.
Hunter Killer : In this level, the player takes control of Derek "Frost" Westwood, as he and his squad infiltrates a Russian submarine to launch the Russian missiles against their own fleet. After escaping the submarine, Frost hops in a Zodiac watercraft and escapes the area as it is being bombed and ends up landing in a friendly Chinook, taking them away from the killzone.
Mind the Gap : In this level, the player takes control of Michael Burns, an SAS Commando. This mission takes place during nighttime in London. The player approaches enemies using stealth. Not much is known about this level, except that it ends in an epic chase in the London tube system between an underground train and a car. Civilians are also killed during this level (This is the "ultra-violent" mission of the level that has been spoken of).It's pretty intense. The level's title is a reference to the warning made to train passengers to make them aware of the gap between the ground and the actual train.

Spec Ops general overview:
Spec Ops now has leaderboards, online matchmaking, progressive ranking and in-game currency
Mission-based Spec Ops will return and will be similar the Spec Ops seen in MW2
Spec Ops are playable solo, offline, split-screen, with a friend online or even with a stranger.
Juggernauts are returning.
Spec Ops can only include up to 2 players

Official Game Covers: (Confirmed by Gamestop)
PC
Xbox 360
PlayStation 3

Multiplayer:
Call of Duty Elite System with some paid aspects to enhance the Multiplayer experience
Call of Duty Elite Premium members will get DLC's for free
Weapon base damages will be increased to compensate the lack of Stopping Power
Security is a top priority for IW
Soundwhoring will not be overlooked
Post-launch updates is a priority for IW
Balancing explosives is a key design point
Theater Mode is returning.
MW3 will build up from CoD4 and polish every aspect from MW2 that "has went too far".
MW3 will focus on gun on gun fights, and less on air support.
Playing the objective in MW3 will be more rewarding, thanks to tweaks done to the XP, Match Bonus, Challenges and more.
There is no Stopping Power, Danger Close, Juggernaut, One Man Army, Commando, Last Stand or Tactical Nuke.
The melee will be nerfed.
It was hinted the classic Callsign system will return.
Quick Scoping will be in MW3 (Confirmed by Robert Bowling).
The MW3 unlock system will be "unique", and will not use currency.
The killstreak system has been re-vamped.

Confirmed maps:
Alpha
Alps
Bootleg
Bravo
Brooklyn
Carbon
Coast
Dome
Exchange
Hardhat
Interchange
Lambeth
Meteora
Mogadishu
Paris
Plaza 2
Radar
Seatown
Underground
Village

Vehicles, ground support and Possible Killstreaks:
Reaper Drone (spiritual successor to the Predator Missile)
AC-130
F16 Falcon
A-10 Warthog
Little Bird
Hind
Black Hawk
Zodiac
Oscar II
USS Nimitz
Mi-24
CH-64 Sea Knight
BTR-80
Leopard 2
Stryker
T-90
GAZ-2975
Sentry Gun
Attack dogs

Confirmed equipment:
Frag grenade
Smoke grenade
Thermite Charge
9 bang flash grenade

Confirmed attachments:
Grenade Launcher
Silencer
ACOG sight
Holographic Sight
Grip
Dual Scope (AKA Hybrid Sight) = Magnifier + Red Dot/Holo, the Magnifier can be flipped
Red dot Sight

Confirmed weapons:
Pistols:
M1911.45
FN Five-Seven (Hypothetical)
P99 (Unconfirmed)
MP412 (Unconfirmed)

Machine Pistols:
G18

Shotguns:
SPAS-12
AA-12
Model 1887
Striker (Unconfirmed)
KSG (Unconfirmed)

SMG's:
MP5
UMP.45
Vector
AK-74u
P90
MP5K
Skorpion (Unconfirmed)
FMG-9 (Unconfirmed)

Assault Rifles:
M4A1
AK-47
FAMAS
ACR
M16A4
G36 (Unconfirmed)
FAL (Unconfirmed)
SCAR (Unconfirmed)

LMG's:
RPD

Sniper Rifles:
Barrett .50cal (Unconfirmed)
RSASS (Unconfirmed)
M21 EBR (Unconfirmed)

Launchers:
RPG-7
XM25
AT4
M203
GP-launcher for AK
M320 (Unconfirmed)

Other:
Riot Shield

In gathering all this information, it took me about 2-4 hours. Hope you all look forward to playing Modern Warfare 3 :arrow:

Remember, please THANK THE TOPIC <33 :nyancat: