The MCU's Black Panther franchise needs to come to an end in Black Panther 3. Chadwick Boseman debuted as T'Challa, a.k.a. the Black Panther, during Captain America: Civil War, but his story and the history of Wakanda were developed further when Ryan Coogler took the reins of Black Panther and Black Panther: Wakanda Forever. Coogler introduced a completely different culture in the MCU and mastered the delivery of a heartfelt story in the wake of Boseman's 2020 passing, but the Black Panther's story isn't over yet, so a third film in the franchise needs to be produced.
