DENVER—When the Denver Nuggets selected Nikola Jokic with the 41st pick in the NBA draft nine summers ago, the 6-foot-11 Serbian was fast asleep. The television broadcast didn’t show the selection live, instead airing a commercial for an addition to the Taco Bell menu. Devotees of European basketball had heard rumors of a portly giant from Sombor who threw precognitive passes, but nobody claimed that the future had changed.