Black Panther: Wakanda Forever (2022)

The people of Wakanda fight to protect their home from intervening world powers as they mourn the death of King T'Challa. T'Challa is dying from a terminal illness, and his sister Shuri attempts to cure him using the 'heart-shaped herb.' Wakanda faces pressure to share their Vibranium and is blamed by other nations for a Vibranium race. Namor, the king of Talokan, threatens Wakanda and demands the scientist responsible for the Vibranium detector. Shuri and her allies are pursued by the FBI and Namor's warriors. Shuri meets with Namor, who shows her his underwater kingdom. The Maya history and their shaman's vision are revealed. Nakia helps Shuri and Riri escape, and Namor retaliates by attacking Wakanda. Ramonda drowns while saving Riri, and Namor vows to return with his army. Shuri reconstructs the heart-shaped herb, gaining superhuman abilities and seeking revenge. Wakanda prepares for battle, and a counterattack on Talokan is ordered. A peaceful alliance is eventually forged, and Namor's cousin is upset by his surrender. The future of the Black Panther mantle is secured, and T'Challa's son is revealed in a mid-credits scene.