Although I haven't (yet) got a 360, I'm still looking forward to Resident Evil 5 and Gears of War 2. Probably because I'll have a 360 before they're out, so I can get them ASAP. xP
2 games that i would want to see sequels to that will most likely not happen is Aggressive Inline, JSRF: Jet Set Radio Future. I know in the sega tennis that one of the people from JSRF is in the game but dosnt mean much. For games that might have a chance of having a sequel i would want to see a perfect dark and KOTOR would love to see those to have another sequel that isnt rushed or half assed and play well.
Not really "sequels" but I like Series' if that counts. The next Legend of Zelda, Resident Evil, and Final Fantasy will definitely be in my collection.
The day they make a Super Mario World 3, I will piss myself. I'd do anything for another Mario riding Yoshi adventure!
I'm really looking forward to Tales of Symphonia: Dawn of the New World...for the Wii. its gonna be sikk