Not sure if this has been posted or if it's all info found in other leaks, but I kept this bookmarked just in case: http://archive.is/Y3X1v

They apparently were aware of the existence of Ultra Beasts, which is the only reason I think the post has credibility. "New" stuff is that Lusamine is Lillie's mom (I assume people have guessed this already) and that the legendaries Solgaleo and Lunala have a common pre-evo. Grain of salt, etc.