I'm an anti-Ridley, and I've been against him since forever, but I went back to watch the Direct and saw it again, Sakurai only said there are bosses in other stages and showed us Pyrosphere, which had a shadow of Ridley, now that I think about it no one stated that:
1.Ridley was the boss character
2.The Shadow of what looked like Ridley is the shadow of the boss character
for all we know Pikachu might be the boss character,right ?! you see my point there ? we assumed it wasn't Pikachu because he's playable and he doesn't have to do with Pyrosphere and Metroid but when he showed us the Shadow of Ridley, he knew we'd all think that he is the boss character he was talking about, when he isn't, he just happened to be fighting Pikachu on that stage.
I hate Ridley and I don't support the thought of him being in Smash bad damn I can't argue with facts and if he's in, it's what it's Ridley fans I suppose if my conclusion is correct and Ridley was in, I apologise for doubting him.