There's a Teaser up on XBL Marketplace and (subsequently) Youtube. Be advised it's a lot better with full quality and a bigger screen via Live:
YouTube - Dead Space 2 Trailer / PS3 - 360
Now, according to a Gameinformer article published in January:
- Isaac Clarke's mind has been permanently altered by The Marker, and the game begins with him in a hospital.
- It's been 3 years since the events of the first game, and this one will take place on a large civilian spaceport/space station (named The Sprawl) which includes churches, hospitals, living quarters, etc. and
plenty of people.
- If I'm reading the article right, they have purposefully made this one less scary because "people were - believe it or not - too scared playing Dead Space".
- Isaac takes on a role similar to Ripley in Aliens, in that he's the only survivor of the Ishimura incident and people will therefore listen to him. This time, he'll send
others to go run errands, leaving more interesting and/or "intuitive" tasks for the player.
As a result, his character is supposed to be fleshed out much more, and "he'll have a voice".
- The Church of Unitology will play a more significant role in the story.
- The kinesis module has been fine-tuned and (supposedly) improved.
- Instead of just jumping from wall to wall in zero G, Isaac can now maneuver more freely.
- Upgrades to armor will be more distinct.
- As with any sequel, there will be new weapons and enemies. These include a Javelin Gun that pins enemies to walls if fired correctly, mutilated/infected children which attack in massive numbers (Hello Force Gun and Pulse Rifle!), and another enemy type which works in packs (raptors from JP anyone?

)
- There
should be an
online co-op mode, where players work together (a bit like in Left 4 Dead) to get from place to place and survive. This is a big plus to me personally.
Needless to say, I'm stoked! This will probably be the first time I get to pre-order a game.