The sequel will introduce a new Black Panther, as we see somebody wearing the familiar armor, from head to toe, and that new Black Panther is a woman.
She’s the sister of T’Challa, so in Wakanda’s society, where T’Challa became king following the death of his father, it would make sense that another member of the family would take over.
There is another, less favorable reason why the identity of the new Black Panther may be getting hidden despite the fact that everybody has possibly guessed it.