Horn said the studio is yet to finalise plans for what the fifth installment in the Lucasfilm franchise will be about, reported Digital Spy.
"We haven't done anything. We don't have a story. We need a story," Horn said.
He added that it did not make sense for Disney to move ahead on the project until it had finalised its purchase of the marketing and distribution rights to the franchise from Paramount Pictures. That deal was completed earlier in December.
He added that the Star Wars franchise, which Disney acquired alongside Indiana Jones in its 2012 Lucasfilm purchase, is planned to release a new film every year.
The Indiana Jones franchise returned in 2008 with Indiana Jones and the Kingdom of the Crystal Skull after a 19-year hiatus.