Z-Dub's rookie contract could be worth around $45 million over 4 seasons ... so the dude's set for a while ... but he'll be making WAY more off the court with his shoe deal and other sponsorships.
As we previously reported, Zion was wearing his Nike Kyrie 5 sneakers at a private workout in L.A. earlier this month .. so it seems like he's leaning towards the Swoosh, despite his PG 2.5 giving out on him in a game earlier this year.
Shoe legend Sonny Vaccaro -- who's responsible for Michael Jordan's rookie deal with Nike --previously told us he'd give the star $100 MILLION to ink a shoe contract. Not bad for an 18-year-old.
Congratulations, Zion. You're really, really rich!!!