http://www.youtube.com/watch?v=Tsvmgr0liP4
"Why give up, why give in?
I'ts not enough, it never is.
So I will go on until the end..."
Pyrosphere not being in the demo is weird because
a) It is one of the first stages to be shown and only behind battlefield in terms of screenshots and
b) stages that were shown a week before were actually there
This means that Sakurai avoided the Pyrosphere in order to hide something or simply because he felt like it, I think this debunks the "Sakurai wanted to hype the boss battle against Ridley" because if that was the case, Why didn't he showed it on the E3? The place where hype is in the air? Why didn't he showed this exciting new addition to fight against the players in the demo? Something like "people that play the demo will be excited about fighting Ridley"
Also, Sakurai mentioned that he wanted to make this game "the best gaming game" or something like that, but it had to do with characters, if Sakurai thinks that the like of Chrom, Chorus men and Greninja will represent that then he had gone mad.
We'll finally know his fate in September but I'm still thinking he is playable as Sakurai is acting out of character with him