Michelle Pfeiffer is reportedly close to joining the Yellowstone universe in the upcoming sequel series. The original show will end after the second half of Season 5, and the sequel is set to launch soon after. Matthew McConaughey is rumored to star in the new series, but he has not yet signed a contract, as he wants to see the script first. The sequel is also expected to feature some original cast members from Yellowstone, but negotiations over salaries have hit a roadblock. Kelly Reilly, Cole Hauser, and Luke Grimes are demanding higher salaries, and if a deal cannot be reached, the show may move forward without them. The network has given them an ultimatum and a deadline to respond.