I think the only official news so far have been:
1) The trailer from the Pokémon Direct, first announcement of the games.
2) The names and vital measurements of Xerneas and Yveltal.
3) Sylveon revealed as "Ninfia" in CoroCoro.
4) Sylveon's International names revealed.
This, as well as some minor tidbits from the announcement post on Masuda's blog (where he just summed up the stuff from the announcement, as well as clarified that there will be a new mechanic). The rest, already enough to fill a small library, has just been outright fan speculation, or fan speculation disguised as official leaks. And it hasn't yet been two months.
EDIT: Pombo, be quiet. We all love a good speculation. Makes the game generate fun for several months before its release.