First up, the HGUC Delta Gundam! (The "perfect" version of the Hyaku Shiki, fully trasnformable and all that. Makes the Zeta look like a pile of rubbish).
I've heard that there will be two versions of this kit--one with the gold coating and one without--though I'm not certain how reliable that information is (or even if it is at all).
And then there's the new HGUC Ball set, this time featuring the K-Type ball from 08th MS Team will be released at the end of February, 2012.