Bill and Ted still haven't written universe-saving song in 'Face the Music' trailer

June 9 (UPI) -- Tuesday's Bill & Ted Face the Music trailer shows that the titular time travelers -- who are now in their 50s -- still haven't written the song they were prophesied to create to unite the universe.

Lifelong friends and notorious slackers Bill S. Preston, Esq. (Alex Winter) and Ted "Theodore" Logan (Keanu Reeves) are seen in the minute-long preview discussing whether they should travel in their magical phone booth to the future where they have already written the song, then bring it back to the present.

Along the way, they confront muscle-bound versions of themselves in prison.

"How'd you like our song?" the alternative Bill asks.

"It's a little on the dark side, you know, but it's cool," original Ted replies.

Galaxy Quest director Dean Parisot helmed the film, which is slated to open in theaters Aug. 21. It follows 1989's Bill & Ted's Excellent Adventure and 1991's Bill & Ted's Bogus Journey.