I hope they don't bother with Spinal or Riptor,
Spinal has already been confirmed by that Info-Dump from a few weeks back, and talk has already been mentioned that suggest Riptor (or at least another Dinosaur-style beast) will be in the game.
The devs kept spouting gleefully at the fact that a fighting game would let one play as a "Ray Harryhausen Skeleton" in it in some of the E3 videos, so I think they're pretty big fans of him.
This is another place where KI actually stands out; It's pool of inspirations for characters was rather wide. It's cool to have a fighter that could use basically anything one fights in Castlevania as inspiration for characters. From Flea Men (man that'd be annoying) to Dullahans, Elementals, and Mermen. I wonder what a KI version of an Alraune would look like...