I tried running the demo but I only have a keyboard at the moment and it doesn't have a training mode, so I can't really run the actual game. It would be nice if there was like a mode with a no-AI CPU to beat up to look at how moves and movement feel, assuming you don't have AI set up yet.
I'm pretty confident that I know who the others in the banner are (well, Flyogenes and Platopus are pretty open about it), but I'm very curious who the Gecko is. I assume that's for a later reveal, of course, and I'll be looking forward to it.