In George's early drafts for A New Hope, Owen Lars was going to be Obi-Wan's brother. They could easily introduce this into the story and it could add another dramatic element to the show.

It won't break much canon because we don't know much about Obi-Wan's life before he came to the order except that he was brought in later than most padawans and he is from a planet called Stewjon.

Anyway, I think Stewjon is the dumbest planet and should be retconned. 

Thoughts?

Also this Kenobi fan poster looks incredible.