Ah, I see. Well, there is the unlikely possibility that Purge takes place in RODV, after Alderaan and before Kashyyk...
Yikes, if it does it's total bs since in Purge Vader takes out what? Eight Jedi Masters at once yet is about on par with one Jedi Master at the end of ROTV?
Vader would never ever return to Tatooine anyways.
Why not? If it was for the Empire he would.
Oh, my bad, I guess they fought in Kalakar Six. It took place in a comic called Resurrection.