Knew it! I'm super hyped for it, too! It sounds like you play a pre-built world in Mario Maker, and the first few people in line get a golden 'Super Mario 30th' pin, which I also called (but not on this site).
I guess that means I'm a psychic…
Hmm…
PK FIRE!
SSB Mewtwo Launch Party! Click the globe icon to join!