[Karuma]

It wouldn't be too hard to do any of the things you mention. See ControlNet for Stable Diffusion, and vid2vid (if this model does txt2vid, it can also do vid2vid very easily).

So you can just record some guiding stuff, similar to motion capture but with just any regular phone camera, and morph it into anything you want. You don't even need the camera, of course, a simple 3D animation without textures or lighting would suffice.

Also, consistent look has been solved very early on, once we had free models like Stable Diffusion.