That's my fear with this... That going forward T'Challa becomes an origin story for Wakanda.
Shuri becomes the default because T'Challa was cut short. I can't see this going well for T'Challa at all and them forcing him out of his own franchise if the sequel, or the whole thing crumbles because they tried to make something work with the supporting cast that couldn't pull it's wait. Both ultimate make T'Challa the loser