The Wrestling Observer Newsletter noted that the 2027 WrestleMania is officially in Nashville at what will be a new stadium that opens that year. The idea is that Mania would be the first or one of the first big events at the stadium even before the Titans start playing there a few months later. Burke Nihill, the President and CEO of the Titans made that announcement.
This has supposedly been the plan for a while providing the new stadium was up and running in time.