I'll put aside any dislike I have for "fairy" types and analyze the actual info:
Immune to Dragon? Dark is OK, but Dragon is game-changing.
Weak to Psychic, Poison, Bug, and Ghost: Buffs those as attacking types (but no Grass...)
Resists Fire, Water, Ground, and Flying: Four elements? They at least clearly did research here. Also seems a little ludicrous that it resists BOTH of Reshiram's unresisted STABs.
No type is weak OR immune to it, but resisted by the four elements? You know, this has just enough thematic stuff to seem real, yet... it resists Fire, Ground, and Dragon. Seems too competitively focused to be genuine Game Freak work. Who knows; they might be getting better; have they seen the Kyurem Formes fiasco and are actually reading Smogon's stuff?
Don't know anything about the reliability of the source, so can't comment on that. Seems... just thematic enough to be real, but a little too good competitively.
For those of you starting topics about the PS4, there's a PS4 board: http://www.gamefaqs.com/boards/691087-playstation-4