User blog comment:DerpyPanda24/Opinion/@comment-5972662-20140730031825/@comment-25241443-20140802081652

True, they did not showed Pyrosphere in the demo, but that is only because the stage was not finished yet. Yes, Sakurai is hiding Ridley from us, even after he showed us Ridley's shadow, in which Ridley is already hinted as a stage boss, and not playable. I am afraid that your proof is invalid.

And besides, from what I have heard, Corocoro magazine might release the final roster leak on August 12th, and I am sure Ridley will not be in that roster.