Is the force involved? What era of Star Trek is the Federation from?
I mean a Force storm followed by full attack by Star Wars against an Archer-era Federation would be a slaughter. But a Time-ship era federation versus a non-force powered Star wars is also a slaughter.
Well, then a Wormhole is still available, Palpatine is still draining the life of twenty billion beings passively, still capable of destroying small armies with Lightning, still fighting at near-relativistic speeds, and still mind-wiping twenty billion beings effortlessly.