I wonder if Shia LaBeouf is returning? 
He's probably far too involved in his current performance art piece to even notice this voicemail that was left on his iPhone:
"Hey, uhhh, Shia? Yeah, it' Stephen. Spielberg, just in case you were wondering. So, uh, I guess you heard about Indy 5, right? So, Larry is writing it, and we were going over the notes. And well, Spike died off screen in an unfortunate popsicle accident. We thought it would help inform Indy's character arc through the movie. So, uh, we're not going to need you. Okay? Bye."
If Indy's birthday is July 1, 1899 - they could set this Indiana Jones movie in the 70s and the "new" young character in this movie could be Mutt's son who is trying to find his grandpa to let him know about Mutt's tragic popsicle accident.
The problem is that his grandpa, Indy, has been missing for years, lost during an adventure to find
the first Jedi Temple an ancient South American magic temple.
The movie ends with Mutt jr. finding Indy hiding in the temple. Mutt jr. slowly reaches out to hand Indy his long-lost whip......
