There had been speculation that Shia LaBeouf, who played Jones' sidekick Mutt Williams in the last of the swashbucklers, the Kingdom of the Crystal Skull in 2008, might take up the hero's bullwhip.
But Spielberg's comments - made during an interview about his latest film, Cold War thriller Bridge of Spies - seemed to indicate that Ford could yet be asked to get his old bones into the role for one last hurrah.
'Big Friendly Giant'
As for himself, the legend behind such Hollywood classics as Jaws, ET and Schindler's List, said he still feels he has a lot to learn.
"After 40 years I don't feel as experienced as people might assume," he told RTL. "I still feel I am learning and I am really excited by new projects."
Spielberg said he was finishing a screen version of Roald Dahl's much-loved children's book The Big Friendly Giant, often called BFG by its many fans, with British actor Mark Rylance, which is due to be released next July.
He is also working on a science fiction story called Ready Player One, adapted from a novel by Ernest Cline, which will be another "big fat entertainment I hope".
Whether a fifth Indiana Jones film ever makes it to the screen, Spielberg said that it was very unlikely that he would ever direct a Star Wars film, the franchise created by his friend and longtine partner, George Lucas.
"I am a huge fan of 'Star Wars'.... but I think it was never in my stars for me to direct one," he said.
He claimed, however, that the latest instalment of the series, The Force Awakens, could be the highest grossing film ever when it opens in cinemas next month.
- AFP
