HAL is really about to reveal that this is actually an evil alternate dimension Dedede who has been trying to replace our Dedede for years, nearly succeeding in 64, and at it again now with the abduction of Dedede's entire waddle dee army.
Next Level Games has what it takes to bring back Wario World in a big way. They can make a mean Luigi's Mansion, and Wario World is basically Luigi's Mansion with more punching!
Y'know what could make for a fun Super Mario 35 update? A costume dispenser. 1000 coins randomly nets you one of 35 costumes for Mario. New costume each time.
If they'd rather not invest more resources into a temporary game, it could be neat in a future standalone version!