That talking green rabbit is one of the things I love about the original comic.
I would think Lucasfilm may have kept them from using Vader as much as they would have liked back then though. It was a long time after the movie adaptation when he finally made an appearance.
Anyway, the reasons for firing this guy seem pretty shady to say the least. Who’s really calling the shots, Marvel or Lucasfilm? I thought Lucasfilm had the final say on Star Wars comics, at least they used to.