Dont bet on it. Im fairly sure the engine would need reworking to allow it. Its not a simple case of animations. Plus, if it were just animations, few people have the skill and time to rework every animation in the game.
That said, I think Skyrim's combat is just fine.
What? The combat is terrible. It takes no skill to fight an enemy, and most of the time to win a fight, you just slash at his feet and he's dead.
I'm well aware of the effort that would have to be put into this, but if people could redo the entire land of morrowind, for Obliivion, then someone with enough skill and time, can surely make the combat more challenging, and by that, I don't mean more health and stronger damage from enemies, which is all it really is on the hardest difficulties atm.