What do you guys think about this theory?

Imo there are way too many "coincidences". If just the cake website indicated april 2nd, maybe I would believe it, but the Imagine Dragons tweet also indicated that same date, it just seems very unlikely it wasn't intentional.

But it would mean that William was the one to break an NDA, since it's his shitpost account, but I don't think he would do that, even if by accident. There's no way he wouldn't know about stuff like this considering how close they are to Nintendo.