Lucas didn't just make Star Wars . Whether Disney will do anything with these latent IPs is anyone's guess.
Howard The Duck*
*Assuming they didn't pick this up when they merged with Marvel.
Via: filmjunk.com
Willow
Via: wordsmithonia.blogspot.com
Labyrinth*
*Maybe. It was a joint venture with The Henson Company
Via: imdb.com
Indiana Jones*
*Though they don't have plans for the series since at the moment.