Instead, KingsIsle has set up a Wizard101 Mystery Composer page that will reveal hints, one at a time, until the artist is revealed. The only hint that's up so far mentions that this person performed on Saturday Night Live.
KingsIsle's J. Todd Coleman feels that when the artist is revealed, it'll be a big deal: "This is a cool idea, because our mystery composer has a huge name in the music business but has never created music for a video game. I'm really impressed by this artist's adaptability and talent. I think our players are going to be very surprised and totally blown-away."
The Wintertusk soundtrack is made up of seven original pieces of music. Currently, the expansion world is on the test server.