I just realized something.
I noticed that in the early James Bond movies, James Bond looks an awful lot like Indiana Jones' father in the third movie. And then I realized something. Those Indiana Jones movies take place in the 30s. If he had a kid around then, that kid would be in his 30s around the time the first Bond movie takes place. If Jones were to have a kid from a short-lived relationship with a British woman...the child might inherit his father's adventurous spirit and natural talent for fisticuffs...as well as his grandfather's physical appearance.
I'll come out and say it: Indiana Jones is James Bond's father.