The official Pokémon movie website has updated. Translations follow:

The Reveal of "Hyperspace Fury", a Move Only Hoopa (Hoopa Unbound) Can Use

This is the mythical Pokémon Hoopa's true form, "Hoopa (Hoopa Unbound)".
We're now announcing a move only Hoopa (Hoopa Unbound) is capable of using! It's called "Hyperspace Fury" and is a powerful Dark type move!

Hoopa hurls its six arms and rings all around the opponent Pokémon, then attacks it from all directions! It's able to damage the opponent even if it uses "Protect", "Detect", etc.
Also, it seems a mysterious bottle is related to the "unleashing" of Hoopa...



This mysterious bottle also appears in the movie "The Archdjinni of Rings: Hoopa"!
100 years ago, the "Prison Bottle" is said to have been used to seal "Hoopa (Unbound Form)" when it went on a rampage!
In the trailer, something very strange happens to Satoshi when he touches the "Prison Bottle"...!?
Just what is going to happen next!?



The movie premieres Saturday July 18th all over Japan! The popular special pre-order movie ticket that gives access to a double giveaway is now on sale!

For further information, see the official Pokémon website

Legend VS Legend

This is the ultimate fight between legends!

Legendary Pokemon "Appear!" one after another from Hoopa's rings! Here, we will present the legendary Pokémon that will participate in this most fierce battle the world has ever seen with video clips from the past:
Clips showcasing Lugia, Latias/Latios, Mega Rayquaza, Regigigas, Reshiram and Zekrom have now been added to this section.

Sources: http://www.pokemon-movie.jp/news/?p=1702 and http://www.pokemon-movie.jp/legendvslegend/