The album featured John Corabi (Angora, The Scream, Mötley Crüe), Paul Shortino (Rough Cutt, Quiet Riot), Kevin DuBrow (Quiet Riot), Joe Leste (Bang Tango), and Jani Lane (Warrant, solo artist), among others.
In 1999, after Lee had left Mötley Crüe, Sharon Osbourne called Castillo and suggested he join the band, which he did without audition.
The doctors discovered a duodenal ulcer that had ruptured his stomach and performed emergency surgery that saved Castillo's life.
In October 2000, while taking time off from Mötley Crüe to recover from his surgery, he discovered a small lump on his jaw and a month later, after it had grown to roughly the size of a golf ball, he sought treatment and was diagnosed with squamous cell carcinoma, a common form of cancer that is not usually fatal if it is discovered early but can spread rapidly if left untreated.
[2][6][7] During the final weeks of his life, Castillo had been working with ex-Ozzy Osbourne and Alice in Chains bassist Mike Inez on a new band and was in the process of hiring a singer.