I saw preview for the show. it said july 23. Is it coming to nick at nite or is it just a marthorn of the show?

According to them, it's "coming" to Nick@Nite but so far, it only looks to last through September 13. (Since the show only lasted for two seasons. It is speculation, but I think N@N only acquired the show since it is a blue-collar comedy, much like Roseanne, which has been a ratings grabber for the network.)