Just saying Ghost, Dark, and Fairy are pretty fucking Moon related. They were also all presented on the Moon side of the trailer.

I know the datamine, but gamefreak could have realised what happened in ORAS and prepared for this, scrubbing them from it, giving us a taster to assume we know everything, then BAM! Alternate evolutions revealed.
They know datamining shit happens, so they could be playing a game with us here lads.