They usually don't post it as an official confirmation until the 15th anyway. As for me, it seems to match the B2W2 Protag artwork a bit as well. So honestly, I can't tell. The set up is really well done and matches other CoroCoros better than the last three fakes I've seen and shows a different screenshot rather than copy pasting the screenshots from the original trailers.
We basically have 4 days to find out and it is about time for the Leak.
As I mentioned in the Legendary thread, I don't mind Yveltal being Dark/Dragon. Doesn't look like a Dragon at all, but I don't mind it. Also they don't have to be Flying type to fly. Look at Garchomp, Beedrill, and Hydreigon.