Como as vezes não se sabe quais notícias são rumores ainda e quais foram confirmadas:
Informações confirmadas oficialmente pela Epic ou Epic Staff.
- It will be a larger, more intense Battlefield.
- Chainsaw duels
- Improved cover system
- Hammer burst now single shot
- Meat shield in both multi player and single player
- Carmine is back
- Gears of War 2 takes place six months after the light mass bomb was detonated in gears
- Gas grenade(poison grenade)
- Gorgon burst pistol(locust 6 round burst pistol)
- Active reloads adjusted different features for different guns
- New weapon specific melee’s and executions
- Drop in drop out co-op
- Multiple difficulty settings
- Gridlock is back
- Two new species confirmed, locust rock worms and locust kantus(able to use sonic attacks and revive fallen locust)
- Blood trails and smearing
- War journal
- Deeper story
- 5 vs 5 online
- New way to chainsaw(taint to neck)
- New characters
- Destructible environments
- No longer invincible during chainsaw
- Vehicle levels
- Forced walking scenes replaced with a dynamic conversation camera system
- Notable graphical improvements in terms of lighting and amount of enemies on screen.
- Longer story line
- New weapon Scorcher (Flamethrower)
- Assassination game type altered. everyone respawns until their leader is dead. when the leader is killed they stop respawing and the game ends when everyone is dead on one team.
- Assassination renamed ‘Guardian’.
- New game type ‘Wingman’ 10 players split into teams of two.each team is played as different character (eg Marcus and Marcus vs Dom and Dom etc)
- Features Matchmaking
- New game type ‘meat flag’ sort of like CTF but epic have done this in their own way. The flag will instead be character wandering around the center of the map. He has his own weapons and even a place on the leader board.To capture him you will need to down him and pick him up as a meat shield and take him back, slowly, to your base. If you shoot the meat flag enough times while he’s being dragged back to base, his captor will loose him and he’ll go crazy on everyone around him.
- Specific weapons will cycle round the maps.
- Stopping power - if your running towards an enemy but he is firing straight into your chest, you will slow down.
- The opportunity to spawn with either the lancer or hammer burst.
- Bullet shields. big metal shield that stops you from getting hit. can be planted into the ground to make a new cover. enemies can kick it down though if they get close enough. However you can only use a pistol when carrying it also it slows you down drastically.
- Grenades can be stuck anywhere. not just on enemies. they can be planted on the ground,walls,doors etc to produce a proximity mine.
- Smoke grenades carry a stun effect that rag dolls anyone in range.
- On games with no respawn, when you are dead you can fly around the map as a “ghost cam”. You can even take screen shots that will be uploaded to the community.
- New map - ‘river’ - symmetrical map, each team has a thin strip of land with a house and sniping tower, and in between them a river.
- New map - ‘Security’ - long thin map. to the left and right are stairs leading to veranda’s that run the entire length of the map. you are barred access however by red lasers, which will kill you if attempting to pass through. A power weapon is barred on the other side of the map while at the other it is defended by sentry guns. There is a button in the middle of the map that turns the lasers and sentry’s off for 20 seconds.
- “X” button: Traditional curb-stomp.
- “B” button: Melee attack that will be weapon specific. (Longshot sniper rifle will be used as a golf club of death.)
- “Y” button: Flips your opponent over and let’s you punch in their face … UFC style.
- “A” button: Use your enemy as a “meatshield” that limits your weapon choice to a pistol.
- All weapons have a variable amount of “stopping power” that’ll slow down an opponent’s running or diving abilities.
- Whoever does the quickest amount of “B” button tapping will be victorious.
- Your teammates can help give you an edge in the duel by shooting the opponent which will give you the upper hand on the “B” button mini-game.
- No duel will occur if a player is chainsawed from behind. Instead, “butt to head” chainsaw animation will kick in giving the attacker and instant kill.
- Two people can chainsaw one guy at the same time.
Não há informações não confirmados…
Informações falsas comprovada por moderadores dos fóruns da Epic
- The length of the campaign will be around 15 hours
- If you play the entire main campaign in co-op, there will be special cut-scenes and decisions that will affect the game various endings.
- A new boss called “acheron” revealed. it looks like a gargantuan mammoth that the locust use in order to destroy large vehicles
- New multiplayer mode called “ordeal”, it’s a mission where you compete to see who kills 100 enemies first.
- New multiplayer mode called “en-garde”, chainsaws only!
- Stamina Bar
Se alguém quiser tradução, é só dizer que eu coloco 
Informações do seguinte link: http://gearsofwar2forums.com/viewtopic.php?f=2&t=21
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