Everything Necromancer hopes to have out this year, especially the Wilderlands boxed set.
Probably a lot of the Green Ronin material for D&D, if it continues to be as good as past material, so most likely definites.
I would like to get Dawnforge, Midnight, and Iron Kingdoms, but I already have more campaign worlds than I know what to do with.
The Troll Lords map supplements.
I'll probably get the redone Denizens of Darkness and anything else Ravenloft/Art Haus has coming out.
Anything Traveller.
May update my Shadowrun stuff. Probably not, since I haven't heard of a single game around here.
WOTC-absolutely nothing.