well the great thing about USH is that JW is on the lower lot & PETS is on the Upper Lot, so you could almost argue that it'd be like Orlando opening something in IOA & Studios within the same year (not necessarily two rides). JW is just an overhaul of a pre-existing ride. Honestly, I'd consider this as long-overdue maintenance.
With Star Wars opening, Pixar continuing, and Marvel on the way. It'd make sense for USH to want to push harder on getting both PETS & Nintendo open sooner than expected. Hell, even Sea World San Diego is trying to up their game in 2020 & 2021.