I don't mind not knowing the origin of Yoda, especially since revealing the backstories of other characters have ruined the mystery to them. We'd probably find out Yoda was some test tube baby stolen by a bounty hunter and used to impregnate a droid, and that he was raised by Chewbacca, which would explain the good relations with the Wookiees I have, despite the fact that Yoda is several hundred years older than Chewbacca.