I think what you said there was pretty accurate. Yeah, for a while I had been suspecting Snubbull to be Fairy Type. It is pink and pretty, plus that scary face is oh-so-lovable! :D
I think you named the Pokemon GameFreak is most likely to change. But Gardevoir? I read it on the Pokemon Data Base that it is now Fairy Type. Sure, it hovers around with a pretty bubble and is kind and graceful, but then again... well, Misdreavus could be changed to Fairy/Ghost. It's kind of like a bad omen, but it still holds some Fairy-like qualities.
Plus Skiploom is in the Fairy Egg Group. But it is already a mixed type... Corsola, it has it's chance, doesn't it? It holds a beautiful spike, it can't live in polluted water and in it's own way, is quite delicate. Kingdra certainly has a chance, hey? Like, I could easily see a Water Fairy riding one, but does that count? Celebi... to me, this is very likely. It reminds me of a mythical creature, like a Fairy, I guess. xD Beautifly, why I even mention this, is unknown, but it reminds me of something...
That is my personal opinion. ^^ Through all of this, I say God has his mysteries... But GameFreak has more... >:D