Disney have already confirmed that a rematch will take place in the kenobi series. You're right though, I kinda preferred the idea of Vader meeting obi wan again in episode IV, 20 years later, realising how old he had become.
Dang, I did not know it. Well, I don’t see how that can be good for the story. Sure for the people will be extremely fun and probably they will copy this video:
At this point, I think Palpatine and Darth Vader reign has nothing else to give to the story. Yeah, we already know how bad is Darth Vader, how useless is the Empire, and how much the jedi suffered. They should start producing stuff about other eras in the Star Wars Universe (I always thought that Star Wars could had been much better by having a story similar to Game Of Thrones or even Dune, mixing politics and action, but that would imply losing the kids audience -Disney’s target).