I need him to shout “Noooooo.”
And I hope the two don’t actually encounter each other in the present during the show. ANH strongly implies and feels like they’ve not met since Vader “left” Kenobi. It should be a 20-years-in-the-making encounter.
Hmm. Well, I wouldn’t choose to pit the two together in 10BBY, but maybe they’ll do it in a way that feels congruent.