According to Serebii, the official site now refers to Mewtwo's new form as the Awakened form. And since I can't find anything on the English site, it's probably a Japanese thing. Which begs the question: where does this whole Éclair thing come from? Maybe both words are similar in Japanese? Who knows?
In other news, this picture has popped up, and despite the outlines, it does little to hint at Sylveon's typing, aside from the pink color which is most commonly associated to the Normal type, and a shape that resembles a wing near the bottom, which suggests Flying. So guess what? We're at the exact same point as we were two months ago! Just super.