I feel like Indiana Jones is a popular, multi-generational IP that is worthy of an attraction, but at this point in time, I don't see it having more or less of a draw than Dinosaur already has. It's one of my favorite films, but its main demographic is definitely an older crowd these days.
It's very clear that Disney primarily wants to push in mega-IPs that bring in significant merch revenue, and I don't think the company views Indy as such.