Travis Kelce has had his fair share of notable special guests on his and brother Jason's "New Heights" podcast, including his Kansas City Chiefs teammate Patrick Mahomes. However, this week's episode might have the most star-studded of them all.On Monday, the legendary tight end announced via social media teaser that his girlfriend, multi-platinum pop superstar Taylor Swift, would join the show for the first time this Wednesday:There was much excitement from fans online over the announcement:Stephen Lylyk @LylykstephenProLINKYeah this is about to break the internetHard Rock Bet @HardRockBetLINK@newheightshow +25000 he proposesIcyVert @IcyVertLINK@newheightshow The most watched podcast of all time is about to dropPlayoff LAL @PlayoffLALLINK@newheightshow This might get 50 mil viewsXavier Sanchez @Xavier_Sanchez4LINK@newheightshow Huge moment for the podcasting world. This is going to do numbers.S Λ Μ @sighsamuelLINK@newheightshow This is about to be the most watched podcast everTeammate's potential extension may spell the end of Travis Kelce's careerAs he enters the second half of his 30s, Travis Kelce has been busy embarking on off-field endeavors, mainly in Hollywood. Besides his podcast, he has also dabbled in acting and television hosting, and he also organizes the Kelce Jam concerts.Such investments may prove a good thing soon because, at least according to FanSided's Zachary Roseman, it will financially be very hard for the Chiefs to justify keeping their most dominant pass-catcher in recent memory beyond 2025.Should they elect to extend cornerback Trent McDuffie, adding to similarly important extensions given to edge rusher George Karlaftis and linebacker Nick Bolton, might mean the end of Kelce's legendary career:"The Chiefs are projected to be more than $51 million over the cap next season, and that's without a McDuffie extension. Assuming McDuffie gets paid like one of the best defensive backs in the game, that number will go way up."Speaking to Kay Adams on Monday, McDuffie gave a positive update on negotiations:“I know it’s coming. And right now, I don’t really want to worry about it, like I want to really just focus on doing what I can for this team, and letting all that contract, all that money stuff be handled by the person I pay, which is my agent... Things are looking good out here in KC.”The team's first game of 2025 will be against the Los Angeles Chargers on Sept. 5 in Sao Paulo, Brazil. Kickoff is at 7:15 p.m. CT on YouTube.