I'd be really, really impressed with like a triple narrative going on that follows Obi-Wan, Vader, and Bail Organa all trying to accomplish different things.
I'd also like to see an Obi-Wan who is near what we see in the original screenplay; broken down, a little bitter with how things have gone. He can't be happy go lucky all the time.
Would also be baller to have Qui-Gon slowly manifest more and more over the course of the show. LIke only a voice at the start, and then maybe a faded apparition near the end.
Really interested to see what sort of "last scene" they can come up with that isn't cliched, or a straight rip off of the Obi-Wan watches Luke from a distance scene in Rebels.
Maybe Obi-Wan can break the fourth wall, look right into the lens and say, "Well, at least there's a new hope!" Roll credits.