Im also amember of the SirStevesGuide forums and a member by the name of Tycho posted this figure along with a few other figures and he said that Commander Gree and the other figures had been confirmed.
Im hoping that this figure isnt a simple repaint, but I guess that depends on what he looks like in the Cartoon.
i was bored today, so i decided to go on the databank(i never use the databank, wookieepedia is waaaaaaaaaaaaay better), but i looked under the list of characters in the upcoming clone wars movie, and sure enough he was listed. i know he was confirmed for the series, but i don't think he was confirmed for the fim yet.
He actually looks cool. I'm glad they went the same route they did with Cody and incorporated elements from his Phase 2 look into this design. Hope they do the same with any of the other commanders if they're brought in.