Clone Wars Sith vs Twilight Volturi
These are the SW prequels:
Backstory: Palpatine learns of the Volturi's and dispatches his most powerful Force users and lightsaber artists: Darth Maul, Count Dooku & Darth Vader (pre - Mustafar) to eliminate them.
The Volturi are granted all of their powers and the Sith are armed with lightsabers and the Dark Side of the Force. Who wins?