Anton Yelchin
Depending on how far back the Indiana Jones reboot goes, Anton Yelchin could play a great, younger Indy.
The Star Trek and Terminator: Salvation alum already knows how to handle a franchise role, but hasn't yet managed to acquire leading man status. If Disney wants to go for a lesser-known actor for such an iconic role as Indy, I would definitely recommend Yelchin.