Last year we got Snow and Tyrannian
----------------------(large images because the small ones are too blurry and the news Tyrannian is missing its nose)----------------------
This leaves:
Biscuit
Checkered
Chocolate
Custard
Snot
Sponge
Zombie
Zombie tends to be cool, and despite the recent disappointment Chocolate can be a decent colour when done well. Checkered tends to be so-so and Biscuit is generally nothing to write home about. Sponge lost a lot after the revamp, but still looks better than Custard or Snot.
Zafaras would wear Zombie well-- those big eyes would look terrific corpse-ified, and the body is a good shape for droopy clothes. It's a bit of a complex colour though and I'd expect them to release a simpler (if boring) one alongside it, so I'm calling Zombie and Checkered.
Traditionally Zafaras haven't done too badly when it comes to new colours (noselessness and blurriness aside) so I'm hoping for a good Zombie and/or imaginitive Chocolate or Biscuit. I suppose the chances are we'll get a Snot or Custard amongst this year's colours, though.