Hi, I just wanted to give a little idea of what can be done with models from the game. Now this is a bit questionable in the legal sense, but if it becomes the only way to to keep characters, well... Someone just please let me know if I'm out of line in bringing this up.
There is this program called Miku Miku Dance. You can import models into the program and use it to pose them, add scenery and props, and make videos of them.
I haven't attempted it myself yet as I am lacking some of the skills needed to do it, but it should be possible to extract a character's model, add rigging and textures and such, and then I know for certain there is a plugin for Blender to convert to .pmd files which is what MMD reads.
I know it's a bit off-topic, but besides being used to preserve models it could also be handy for making poses for future 3D printing of the models. Just a thought.
Is that accounting for mutually exclusive sets?