Sadly, despite my name, I am not supporting Groose for Smash. Why? Although he is an absolutely amazing character, he doesn't fit into a fighting game. At all. His main draws as a character are his personality and his development. Neither would serve him very well on the battlefield. As a matter of fact, I really can't picture him even being an Assist Trophy.
Furthermore, there are far better picks for a fourth Zelda representative. Tingle is the one I think would fit best. He's easily recognizable and would be an evev better troll character than the Wii Fit Trainer. Additionally, he's so quirky that it would be easy to think up moves.Oh, and he's had THREE games on his own.
The other Zelda characters that are possible are Vaati, who, after his absense in Brawl, is highly unlikely, and Ghirahim. Unlike Groose, Ghirahim actually has a very good moveset and decent odds. While I do prefer Groose as a character, I think Ghirahim would be a better Smasher. The only reason I'm not actively supporting him is I think Tingle would be an even better Zelda rep, and I find it unlikely we'll get more than four.
However! With the new Skyloft stage revealed, I find it probable that we will see the man with the slickist 'do in town in the background. And, of course, there will be a trophy, and I'm dying to read the description. Perhaps, and this is stretching it, we will even get Groose's Theme as a playable song... it was certainly given enough lough and remixes in Skyward Sword and has its own meme.