Just registered, mostly to actually be able to see attachments, but hey, might as well throw down a post.
Personally, I'm not incredibly invested in Ridley's potential inclusion, but I definitely enjoy reading all the speculation and rumors being thrown around about potential characters, and there's a lot of that going on here with Ridley, especially now with this "shadow war" the Direct gave birth to. A bit too much nastiness going on here over the whole matter, admittedly, but the reasoned, non-flamey stuff is fun to read.
Assuming a POTD doesn't end up laying the matter to rest between now and then, E3 is likely where Ridley's fate will become certain, or at least close to it. If he's not given a newcomer trailer, the Wii U version will probably be playable on the show floor, and Pyrosphere seems likely to be one of the stages playable; if so, and Ridley is the stage boss, then players will be reporting the bad news fairly quickly (likely with video evidence). But if there is no Ridley announcement AND either Pyrosphere isn't playable OR it is playable but Ridley never shows up during the course of the event, then things will still be largely uncertain, but we could be much more confident in saying that he could be an unlockable character. But until then, I don't think we'll be drawing any definite conclusions from the material we currently have.
Anyway, put me down as a supporter, if not a 100% believer. Ridley seems like he could be pretty fun to play, especially if he ends up as Little Mac's opposite as a few have suggested.