Ace Frehley was previously announced as the festival's May 27 headliner, but on Wednesday Creatures Fest promoter Neil Davis announced that Peter Criss will come out of retirement to sit in with the Spaceman.
"They both spoke, said they were excited about being at Creatures Fest — they were excited about seeing you, the fans — and they talked, and they just thought that what would be great for the fans, for all of us, is if they got together and played some songs during Ace's set," Davis said.
Frehley is also giving ticketholders and opportunity to vote on some of the songs he'll play during his set.
David added that Creatures Fest will feature appearances by every living former member of Kiss, including Frehley, Criss and former guitarists Bruce Kulick and Vinnie Vincent.
For Criss, the performance would be his first since he retired in 2017. He and Frehley have performed together only a handful of times since they were last in Kiss together in 2002. Criss has not appeared in person with another member of Kiss since he joined Gene Simmons in 2018 at a private fan event in New York City.
Simmons and Stanley have reportedly invited Frehley and Criss to drop in as guests on the 'End of the Road' tour. Frehley, however, has refused to come back to Kiss as anything less than a full member of the band; Criss has not commented publicly on the invitation.