My gut instinct said Ash since he "found" the info so quick but after that blog link about Jo I am leaning more towards her. She is starting to fit the "Anakin Skywalker" mold more and more. She really needs Yoda to tell her where anger leads.

And it seems that Kripke is all about some Star Wars lore. I know that in some DVD commentary I heard they told Jensen Ackles to just be Han Solo.

Dean=Han Solo
Sam=Luke Skywalker
Missouri=Yoda
Impala=Millenium Falcon
Gordon=Boba Fett (okay it's a stretch but for some reason his El Camino reminds me of Slave I)
Ava=Princess Leia
Ol' Yellow Eyes=The Emperor