BLACK PANTHER: WAKANDA FOREVER begins with the off-camera death of King T'Challa after an undisclosed illness that even his genius little sister, Shuri, can't troubleshoot and fix. And since Erik Killmonger had all of the sacred heart-shaped herb destroyed in Black Panther, a new Black Panther cannot be named after T'Challa's passing. A year later, Queen Ramonda makes a statement to the international community asserting that T'Challa's absence doesn't mean that Wakanda can be weakened or destabilized by rogue mercenaries or jealous superpowers who want to steal vibranium. So when an American military operation to mine for vibranium underwater ends with everyone involved being killed, the CIA assumes that Wakandans are the assassins. But the culprit is actually the Talokanil, a group of mysterious, blue-skinned underwater mutants descended from Mesoamericans. - Common Sense Media