Indy 4 Spoilers

There are "Indiana Jones and the Skull Title Thing" reviews going up all over the Internet, and many of them give away not-too-great plot points - but plot points that nevertheless shouldn't be revealed before the movie opens commercially - by noting that this isn't so much a sequel to the previous Indy films as it is to other Steven Spielberg and George Lucas movies.
I won't say which ones. But I would like to be among the first to point out that, style-wise, any movie that jumps the shark as desperately as this one does feels like a sequel to "Jaws."