Could you elaborate on your answer? I know you can't go into details with it, but what do you mean that "it has more to do with the second option than the first one"?
I wouldn't mind this, honestly; most of my models from Wolvalix are standard models that could be imported and rigged for the game. It could be something like SFM/Facerig model importing, methink...
I support the Source Filmmaker models, or at least the FBX files they're based on. I've got several custom models for SFM I've commissioned, and I'm not that great with animating in SFM, but importing them into this program would be awesome.