This is arguably a bigger deal than Mario was. If it hadn't basically been soft-confirmed for like, 6 years now, this would be the hypest moment imaginable.
Sincerely hope they deliver on this. Pokémon is huge and incredibly fitting for a theme park format. Power fantasy role-playing game, with primary themes of exploring natural and urban areas, discovering exciting monsters with all kinds of flashy elemental powers, collecting items and creatures using bespoke technology, bonding with your group and fighting against bad guys, and shopping. This could be a cash and marketing juggernaut for UDX if they pull it off right.