Music is the leading cause of nostalgia in video games:
Recently Jeremy Soule posted that GW2 is his last Guild Wars game he works on:

Looking at Jeremy Soule's Facebook (http://www.facebook.com/mrsoule), something might have happened last night: "The music is invited. But not me." via mobile and something about security not letting him in somewhere.
Guild Wars would not be Guild Wars without Jeremy Soule. We're talking "Star Wars without John Williams". If something happened I feel ArenaNet should resolve this issue. I really love Jeremy Soule's music and Guild Wars and Jeremy Soule go together perfectly. I really hope that something changes. I hope we'll hear more of his incredible music in future games in this series!










