Grieving might be the biggest element in the sequel of Black Panther titled Black Panther: Wakanda Forever. We know that Wakanda Forever is not the original story for the second film of Black Panther, but tragedy happened. In 2020, Chadwick Boseman passed away from colon cancer. Grieving the lost of the Black Panther is (or supposed to be) the heavy element in this film.
The death of Chadwick Boseman pushed the team to find alternative route for the second Black Panther film without Chadwick Boseman. Several possibilities might be considered such as to pass on the Black Panther character to new actor, to continue without black panther, or maybe to not release any sequel.