According to Kim Masters Shia LaBoeuf is a leading candidate to play the son of Indiana Jones in the fourth Indy movie (sadly it seems to be coming ever closer to reality). Casting rumors frequently don't pan out but it is an interesting choice if true.
What I think of it really depends on whether the character is a "cut from Dad's jib" type or not. I like LeBoeuf. He was pretty good in both
Holes and
The Greatest Game Ever Played. He did a decent job with complete crap in
Constantine. But it is hard to imagine him in an action mode (should they be giving even slight thought to continuing the franchise through his son).