Well, while supporters made a good point with their analysis leading to an almost correct size, I still use the words from Sakurai ; he said an enemy from Samus' past would appear at any moment while showing the stage. Now who is an enemy from her past ? Difficult to say since we don't know from which game we are supposed to take Samus ; other M ? After Ridley's last death ? I'm pretty sure it's still about Ridley. Which enemy is worth taking a potd AND the caracteristic of being an enemy from her past ? Wasnt one of the main points of Other M revealing a bit of Samus' past ?
And then I got trolled by Sakurai, who reveals Ridley playable, destroying my theory.
Well, thing is..
Based on the evidence we have, the Pyrosphere stage takes place AFTER the Ridley battle.
Similarly, this?
Should technically lead to this.
Now, not sure about you, but there's a problem here. The series prides itself on its accuracy with everything that it does that requires that kind of accuracy. So here's where we run into a problem:
If Ridley returns, he should technically be in pretty crappy shape when it's, y'know, right after the battle. At the very least, the wings should be torn, and there's no indicator of this on the shadow. It also doesn't help that after Ridley's escape, he's killed by the Queen Metroid. So, like this:
Note the wings, which are in tatters 'cause of his fight with Samus. Not sure about you, but Ridley ain't comin' back from that.
It's also worth noting that Sakurai's literal translation of the PotD on the Japanese site refers to 'trauma', which are certainly themes behind Ridley and Samus's relationship. So, honestly, taking accuracy in mind and all the hints we've been given..
There's going to be a playable Ridley, and a Roidley boss/stage hazard. This certainly makes sense, since Roidley seems to be a clone anyway, so the two can technically co-exist in Smash. Plus, it will allow @
AndreaAC to live out their fantasies of Ridley killing Roidley, so everyone wins.
Think about it. This is something Sakurai would definitely do. What a magnum opus of a troll move that would be to have people thinking Ridley is a stage hazard/boss to start, and then at the end of the E3 segment for Smash.. BAM! NEWCOMER: RIDLEY! Western audiences go wild! The Japanese act completely confused at the news! Everyone wins!
tl;dr: Playable Ridley; boss hazard Roidley. Sakurai wins World's Biggest Troll Award.