The future homes of the Chiefs and Royals is becoming a Border War. Missouri and Kansas have come up with incentives to build stadiums, or renovate Arrowhead for the Chiefs. The latest development: A letter from Chiefs President Mark Donovan asking Kansas to extend the deadline beyond June 30 for STAR bonds that would be used to pay for up to 70 percent of stadium projects. “Together,” Donovan write, “we have the opportunity to bring the National Football League to Kansas, anchored by a world-class domed stadium, new team headquarters, a state-of-the-art practice facility, and a vibrant mixed-use and entertainment district.” This comes on the heels of Missouri passing the Show-Me Sports Investment Act, which also sweetens the deal for the teams, paying up to half for the teams’ new homes. On SportsBeat KC, The Star’s sports podcast, veteran Kansas City sports writers Vahe Gregorian, Sam McDowell and Jesse Newell join host Blair Kerkhoff to break down the Border War competition for new or rebuilt stadiums that will cost in the billions. Learn more about your ad choices. Visit megaphone.fm/adchoices