So I've done some digging around on the net for any information on the three unreleased legedaries (the ones that are locked in the power plant), Diancie, Hoopa, and Volcanion, and I came across a post on PokeBeach, which had information including their level 100 stats (without EV training), and their special moves.

I have taken the liberty to estimate the base stats of these three Pokemon, I have assumed that the Pokemon have a neutral nature and 15 IV's in each stat and assuming the base stat total will equal 600.

>Diancie: 45/100/140/100/160/55
>Hoopa: 85/100/65/145/130/75
>Volcanion: 75/110/125/110/105/75

Diancie's signature move is Diamond Storm, a physical rock type move with 100 base power and 95 accuracy and may raise the users defense by 1.

Hoopa's signature move is Hyperspace Hole, a special psychic type move with 80 base power, which can hit through Protect and Detect.

Volcanion's signature move is Steam Eruption, a special water type move with 110 base power and 95 accuracy, which may also burn the target (basically Scald with the base power of Hydro Pump)

I understand that this information may be false and that my estimations are rough, but if the information is true, how you think that Diancie, Hoopa and Volcanion will affect the metagame when they are released?