No way Waddle Dee is the big E3 reveal. They need someo ne who is going to generate big hype, and no offense to Waddle Dee, but it's not him.
I'm also doubtful that we'd see yet another Kirby character included when there's three already, but it is Sakurai, so who knows.
Honestly, if that rumor was true and Waddle Dee and Mii are the only characters shown, my hype would die
so hard. Like, that's really a move Nintendo doesn't need to make. I understand if people really want those characters, but really, they're very,
very boring choices for building hype. They're more of an "Oh, ok, that's cool" type reveal. It'd be very difficult to build up those two particular characters to be interesting, whereas with:
K. Rool, Palutena, Ridley, Takamaru, Mac, Mega Man, Mewtwo, any of those really, have greater hype-building potential. I don't even mean to sound biased, but there's a reason those characters are the most popular choices.