An award winning New Zealand site known as "Stuff" has some new info on the next Indiana Jones film. It seems reliable, but it is not fully confirmed.
Here is what "Stuff" said. There could be possible spoilers.
"Indiana Jones 5 will begin shooting next year, and much of the plot line will be centered around the Bermuda Triangle, an area over the North Atlantic Ocean where a number of aircraft are said to have disappeared."
"George (Lucas) and Steven (Spielberg) have been working on a script and it's almost there," a source explained.
"Harrison is on stand-by for filming next year. This looks like being an emotional and exciting conclusion to the franchise, with Indy facing his biggest challenge yet."
"Shia LaBeouf has a central role again as Indy's son but this will be a blockbuster made in the old fashioned way rather than the CGI efforts of the last movie," the source added.
It seems that the next film will go back to the franchise's roots.