Actually, I think it's probably going to be Fire/Ground. Real Fennec foxes are burrowing animals that live in underground tunnels, and they already have Victini as a Fire/Psychic. Since those two share a very similar appearance, I kinda doubt they'd risk making a 'recycled' Pokemon that is so close to one that already exists.
Gamefreak may be stupid enough to make the same mistake for the 3rd time in a row. It's like with Ash, there's some senseless obsession behind this. My hope? Anything but fire/fighting. Even pure fire I don't mind. Just no friggin kung fu hound. Oh and Fennekin keychain is done! -> htpp://fav.me/d5r4m1k