Cue “Hope” from Rogue One.

@BlazeHeartUnicorn 
THIS LINE THOUGH

@Darth Prime  

 
Also a relatively more obscure (I think) antagonist but still my favorite:  

@Killbeat  

 
I had a similar thought but with the Decepticons.
 
And then Cobra and then the Fire Nation.
 
And it became this whole gag of all these evil factions tripping over each other to invade Equestria.

This would be one wicked crossover

“Don’t be too proud of this camaraderie you’ve constructed. The power of friendship is insignificant next to the power of the force.”

and then a Dalek invasion fleet appears

Equestria is doomed

“What up noobs.”