Townshend, who authored book, music and lyrics for the Tony-winning musical The Who's Tommy, revealed in his blog that the new musical is being created for outdoor and arena performance. Talks are currently underway with New York producers for the musical, which will premiere in concert in 2011. Songs from Floss will be featured on a 2010 album from The Who. "The collected music and sound for Floss convey the story of a married couple whose relationship gets into difficulty," Townshend states. "Walter, a straight-cut pub rock musician, is able to retire when one of his songs becomes the TV anthem of a big car company. He becomes a house-husband while his wife Floss devotes herself to a riding stables and stud. When he tries to return to music after a fifteen year hiatus, he finds that what he hears and what he composes evoke the ecologically rooted, apocalyptic mindset of his generation. Shaken by this and torn by personal difficulties, he and Floss become estranged. A series of dramatic events in a hospital emergency ward bring them both to their senses."

The musician describes the work as being in the vein of Tommy and Quadrophenia, with complex sound effects and musical montages. Townshend adds, "As a 19 year old – with 'My Generation' – I wrote the most explicitly ageist song in rock. At 64, I now want to take on ageing and mortality, using the powerfully angry context of rock 'n' roll."

The Who's Tommy opened on Broadway at the St. James Theatre April 22, 1993, earning 11 Tony nominations. Des McAnuff won a Tony Award for his direction, and Pete Townshend won a Tony for the show's score. The book was penned by Townshend and McAnuff.