Indy exists in a fairly grounded reality and is often put against the forces of nature in the films. Nature also reclaims pretty much any ancient tomb or temple that Indy explores. It would not be a stretch at all to include a number of animals on one of his adventures.
Let’s not pretend Dinosaur needed a deep message about conservation to fit into the park, it has always been a thrill ride where guests are simply humbled by the power of nature. I have no doubt an Indiana Jones attraction would be able to retain that aspect.
Edit: this isn’t to say Indiana Jones fits just as good as Dinosaur, just saying that it’s totally not as much as a stretch as the other properties considered for this area.