Ted Danson's Sam Malone could return in the Frasier reboot, but Kelsey Grammer has one condition. Paramount+ has finally ordered season 2 of the Frasier revival. Plot details are scant since the Frasier reboot season 1 finale can double as a series capper, but Grammer's character living in Boston keeps the door open for a possible Cheers crossover. However, there are unclear details about the status of the Cheers bar in the Frasier reboot. Although the show is unlikely to visit the underground pub, at least in the foreseeable future, there are hopes that a cameo with some of Frasier's old friends from the establishment would suffice.
https://screenrant.com/frasier-reboot-sam-malone-cheers-return-kelsey-grammer-response/