Via jwfan.com: (with a heads up by Yakface.com)

A reliable source just said JW received a trailer from JJ Abrams on Monday, Oct 20.  JW has already written new Star Wars music to accompany this trailer.  This new trailer music will feature new music and will be recorded on November 15 in LA with full orchestra.  Still determining if the score will be recorded in London due to advanced age of composer/conductor.  14 hour flight to LA not too kind on 82 year old.  This is all a secret and this message will be deleted shortly.