Uncharted 2- I'm afraid it will make all my games fail in comparison. Another incredable Uncharted sp, a multiplayer outing that I unlike everyone else think will be great fun, and a Left 4 Dead 3 player co-op mode (I believe it will be 4 player with the 4th character being the guy in the one screenshot we don't know the identity of and whom I think will be Drake's father, but yea, either way). Damn OVERACHIEVER!!!
Mag- I agree with everyone else, CLUSTERFUCK. On top of that, it won't look or play anything amazing.
Modern Warfare 2- MW was new, refreshing and set a new standard for MP. I think the new one will be great but come off as just more of the same.
ODST- Nothing special and it sounds like it will remove some of the things that made Halo great. For instance, Master Chief.
Splinter Cell Conviction- It's been a long time coming which is usually a bad sign and the last game in the series blew and fucked with the old formula and twisted it into a steaming pile.
Bioshock 2- The original was something new and exciting and like COD this will come off as more of the same. In addition, I fear for the story and atmosphere in this one.
FFXIII- I think it will blow. It's taken too long to release, and it seems bland and uninteresting story/character-wise.
The conduit- I think the controls will work great but I think the game itself will be generic shooter crap.