No clue who RZA is, but Shaq is known as an avid collector (superman focus) and as I recall contributed capital to Malibu or another black start-up in the industry when he was still a ballplayer.
In addition on the animation front beyond Space Jam,
he played John Henry Irons/Steel in Steel (DC animation)
He also voiced himself in the animated series Static Shock, Johnny Bravo, and Uncle Grandpa, and in The Lego Movie.
Oh, and Shaq supported Christie in his reelection bid in Jersey (which at least wasn’t a dem)
I think RZA is from the Wu-Tang Clan rapper group.