With Willam Sandler returning to reprise his memorable role from their sequel, it looks like Death is still pretty close to Bill and Ted, and presumably still a part of the band.
Death was once a nemesis that Bill and Ted were pitted against in their second adventure, Bill and Ted’s Bogus Journey, but after losing to the heroes in a series of board game competitions, this specter of mortality became the servant to Wyld Stallions royalty.