Rolf Steinmann/National GeographicYou’ve probably watched the classic animated version of The Lion King more times than you can count, and the number of times you’ve streamed the 2019 live-action version is getting up there too. Well, you’re about to get the real deal: Lion, a four-part event series premiering Wednesday, Aug. 19, follows the rise of a real-life tiny lion cub named Kio in Kenya’s Maasai Mara. The ambitious National Geographic endeavor tracks Kio for four straight years as he grows from a wobbly furball into the leader of one of the largest prides in Africa. And Scary Mommy has...