EVO, if all the prominents show, will be an interesting display for XIII. BALA with his experience with KOF in-general & XIII specifically, Reynald with KOFXIII as his first (I'm probably wrong on that one), Xiaohai with his KOF series experience, and recently getting into XIII, etc. I might've said BALA's a lock for EVO if it weren't for things like Xiaohai's OCVing Tokido at SS with Billy.
Things like that make me think it's really going to be more a matter of style and skill. I should expect lots of the higher-regarded characters will be played. Lots of teams of EX Iori/Mr. Karate/Benimaru or whatever. My wish would be a relatively unknown come out of nowhere to take everyone by surprise with a lower-tier team of...anyone really.
BALA's got the best chance, but it's still anyone's game, and I love that.