San Holo said:Dr. Jones is too much of a ladies man, not to have any offspring at age 60.
I don't think we need to bring that much realism into the series, though. Much like James Bond, audiences accept that Indy is a fantasy hero. He may get the girl, but they don't expect her (or any offspring) to return in the sequel.
And while fans may regard Dr. Jones as a ladies man, that's mainly based on everything BUT the actual trilogy. Hey, the guy passed out on Marion, then blew off Willie to go step on some bugs. (Of course, Shia could be playing Elsa's supernatural love child. Now that would be interesting to see.)
No, if anyone has left a trail of illegitimate kids around the world- it's probably Henry Sr.
I'm joking, but then, who knows? Maybe that old brother rumour actually had some credibility? It would certainly have one advantage in my book: A 20-year-old Jones would not automatically force the movie to be set in the 1950's.