I am buying Sonic Mega Collection and Cubivore off CAGers right now and I just preordered Batman Begins.
From last year I still need:
Mega Man Anniversary Collection (when it hits $15-20)
Mario Power Tennis (when it hits $15-20)
Prince of Persia Warrior Within (when it hits $10-15)
Viewtiful Joe 2 (when it hits $10-15)
X-Men Legends ((when it hits $15-20)
Spiderman 2 (when it hits $10-15)
Games already released this year that I want include:
Donkey Kong Jungle Beat (waiting for some kind of clearance, as this game sold horribly)
... I guess that's it. I already bought RE4.
Upcoming 2K5 games that I want:
Zelda Twilight Princess (an instant buy)
Fire Emblem Radiance (this one is a surefire holiday purchase)
Killer 7 (it would take some VERY negative reviews to dissuade me from an original Capcom title after the awesomeness that is RE4)
Geist (the jury is still out on this one, as it has improved a lot, but has it improved enough?)
Batman Begins (massive Batman fan here, so it's preordered. might cancel if reviews are bad though, I'd settle for high 7's to low 8's)
Mega Man X Collection (instant purchase. I want X1 badly)
Starcraft Ghost (a top holiday purchase)
Spartan Total War (looks good so far, on the list based on just that. waiting for more info)
Sonic Gems Collection (Sonic CD is too good, although I might wait for the price to hit $19.99)
Ultimate Spiderman (if they can overcome the shortcomings of Spiderman 2, Activision has my money)
In reality I will probably pick up Batman Begins in a couple weeks, Killer 7 and Sonic Gems for my birthday in August and Zelda, Fire Emblem, Mega Man X Collection and Starcraft Ghost for the holidays (Spartan might squeeze in there somehow).
The rest of the 2K5 stuff will wait until the prices fall to around $20.