I hope they show off the 3d models, there's some serious jank in those and they look awful up close.
Those were made from scratch by VRoid. Besides the Cinder model, which was a fan made MMD, according to Aden Blitz's clip on Twitter. People may think this is just a continuation of "RWBY artist rips off MMD", but since this is a fanmade project anyways ... it might not be comparable even if the OG RWBY models by RT were truly MMD recolors.
And it's moot since Monty has been six feet under for 7 years now, so there's no way to prove, let alone trace that accusation back to him. Most of the cast has been re-modeled from scratch in Maya anyways.