Considering how low-capacity KidZone is (E.T. being the only attraction an adult without kids might seek out) compared to the 10 acres it covers, why wouldn't Mario come to USF?
Mario Kart E-ticket, Yoshi's Island E-ticket, DK D-ticket, WarioWare/Captain Toad-themed flat rides (both franchises lend themselves well to a wacky flat ride), maybe a Peach attraction (a M&G/show)>>>E.T., Animal Actors, a toddler-only show, two play areas and a kiddie coaster.