What do you think they'll do with the music? Personally, I hope they go with the music of any of the three films. The one that fits best. And if Universal allows them to use unreleased or alternate music (like in the Lego Indy games), then awesome!
But if they can get John Williams... I mean, that would be soooo cool. Impossible. But cool!
(Same goes to BTTF. Get Alan Silvestri! He hasn't done any interesting movies since the 90's!)