Awesome!
We could use Discord (JDW#6422). We are available from 10am to 6pm CEST (Paris) monday to friday, except this monday morning.
I can already give you the infos you listed:
1) On the Full HD version of our characters (much bigger than what we'll need for 3D), we have 2200 pngs, but a lot of them are very similar, and some of them do not need to be displayed on 3D (weapons, pets, etc) so I've copy/pasted a doc we use to keep track of our art progress, removed most of the things you don't need and translated it with Google Translate (just to help you understand).
Every "model" is a different art, and each model exists in x "colors".
It means roughly 370 different arts (150 of them being for the faces, and I'm not sure we'll be able to show them at the scale we'll need them)
We have all the PSDs in 2048*4096, fully organized. We'll share it to you next week.
2) At least "running". We'd like "walking" too. As extra (depends a lot of the budget), we would like to have emotes (wave, dance, bow, etc), sitting and sleeping, but to be honest I doubt it would be feasible considering the tech and the assets we would need. You'll tell us 🙂
3) HTML5 pixi spine. It's based on the official typescript runtime "spine-ts" and compatible with Spine 3.8.
https://github.com/pixijs/pixi-spine
Have a nice week end!