Darth Vader has another vision, or hallucination, about how Obi-Wan defeated him in their duel in Mustafar. A part of the vision is of his son, Luke Skywalker, defeating him in Bespin and killing him before joining Emperor Palpatine.
Really getting tired of these “visions” of Darth Vader. It seems in every new Darth Vader series he has to undergo at least one of these visions and flashbacks.
From – Star Wars: Darth Vader Vol. 1 #10