Instead we are getting a score from the talented French composer Alexandre Desplat. Desplat has worked as a film composer for years now. While he is best known for his scores to drama and romance films, he has composed some fun fantasy scores for Rise of the Guardians and The Golden Compass. But more to the point, he also scored the last two Harry Potter films, and did so using themes created by John Williams. So maybe Desplat isn't quite the odd choice.
That said, I have to say his amazing work on the 2014 version of Godzilla is really something else. Here is a bombastic action sequence called Last Shot. The track is brutal and intense. I'm looking forward to hearing what Desplat cooks up for Rogue One.
Godzilla has been known to stomp on people who don't click an ad before they go.