On the July 6, 2016 stop of the Not in This Lifetime... Tour in Cincinnati, Ohio, Adler joined Guns N' Roses for performances of "Out Ta Get Me" and "My Michelle", which marked his first appearance with the band since his firing in 1990. He made other guest appearances during shows in Nashville, Los Angeles, and Buenos Aires. He was also rumored to take part in the band's surprise April 1 show at the Troubadour, but had back surgery which forced him to pull out.