If Twistoid and Rotar where ever made for MOTUC, how would you want them updated? Would you want them to be a 100% update of the original, or would you want to see them updated with something like removable legs? You could have it be that the figures "detach" from their torsos, allowing them to keep the spinning feature that they had before. Since this line won't have "action features", it really doesn't matter, but if they are made with the ability to seperate at the waist to look more like the original toys, it gives collectors an option of how they want to pose them. This is an idea that ROOK mentioned in another post:
I think something like that could work for these figures. It may even allow for a "reuse" of RAM-MAN's lower torso and legs, since they are bulky on top and would need wide feet and legs to stand.
Another option could be to give them treads for a display base, like Terrortread (from New Adventures.)