Fennekin, but keep him as a fox :'( That is, please do not stand up on your hind legs at the end of the evolutionary line. Just be a fire fox. Pulease.
I seriously don't know what to do if Fennekin becomes some stupid two-legged fighting fox. I think that's why I'm not pre-ordering this time around. If he does, this gen is on the same level as IV and that was my least favorite gen. I only liked Piplup. None of its evolutions, none of the other starters. At least gen V, I could live with Serperior (which is a first since gen II for me, liking the last evolution of a starter) but preferred Servine, and liked Oshawott through Dewott but not Samurott. That was a blessing! Here, I have only one option (unless Chespin gets insanely epic in his next two evolutions, but I doubt that) and I'd love a Gen VI Vulpix. Psychic type would be amazing, too. Typings like that really make me want to use them in my team, like Chandelure and Galvantula.