The official Movie 19 Website has updated. Translations follow:

Story

A Pokémon came falling from the sky!

As Satoshi continued his journey aiming to become a Pokémon Master, a lump covered in white smoke suddenly dropped out of the sky and landed in front of him and his friends.
As white smoke spread around as far as the eye could see, a shape appeared from within it;
The mythical Pokémon Volcanion.

Ignoring the worried Satoshi and his friends, Volcanion, who hates humans, immediately tries to leave the place.
However, the impact of the fall caused Satoshi and Volcanion to be linked together by a strange device, leaving them unable to separate...!

Volcanion runs off and Satoshi gets dragged along by it, eventually reaching the Azoth Kingdom, a city of super-machinery where gigantic cogwheels are all over the place and rotating.
Why did Volcanion fall from the sky?
And why did it head to the Azoth Kingdom!?
With the mechanical kingdom of machinery as its setting, the hottest legend in Pokémon history begins!



What is the power hidden in Volcanion's arms!?

Volcanion violently expels boiling steam!
Its arms can move freely and are split in two; the steam launched from them packs a punch! With this steam it is said to be able to blow away mountains and use the thick fog to hide itself. Because it possesses both the Fire and Water type, unlike other Pokémon before it, the water inlets of its arms can launch both Fire type moves and Water type moves. Also, the blue color of the windows on its arms seems to be related to the remaining water in its body.
For Volcanion, who uses fire and water to create steam explosions within its body and launch moves, water seems to be the source of its energy.

The Next Generation World Hobby Fair '16 Winter

There's lots of fun to be had at the Pokemon booth!
Come visit the Next Generation World Hobby Fair!

Saturday January 23rd and Sunday January 24th: Tokyo Fair
Sunday January 31st: Nagoya Fair
Sunday February 7th: Osaka Fair
Sunday February 14th: Fukuoka Fair

Opening hours: 9am to 4pm (scheduled) (free admission, will not be canceled due to weather)

	Attraction 1: Satoshi's voice actress Rica Matsumoto and Sako-kun will be coming! A special Pokemon anime concert will be held! Satoshi's voice actress Rica Matsumoto and Tomohisa Sako, the nice guy with the XY series' theme song "Getta Banban", are holding a special concert! And not only that, there'll also be lots of other attractions, like information on the movie premiering this summer, a quiz competition where you can win extravagant gifts, and more!
	Attraction 2: Volcanion shows up at the Next Generation World Hobby Fair! Fire its super powerful move in a hands-on attraction! The newly discovered mythical Pokémon "Volcanion" can already be found at the Next Generation World Hobby Fair! A hands-on attraction replicates Volcanion's super powerful move that's said to even blow away entire mountains and forests! Witness this power before everyone else can!
	Attraction 3: A "Pocket Monsters XY&Z" Quiz Rally! Solve the riddles and get original stickers! We will hold a quiz rally centered around Squishy, who has just joined Satoshi and his friends in the XY&Z series! Try the quizzes that are set up around the booth itself and get original anime & movie & Pokénchi stickers!
	Attraction 4: On Sunday January 24th, the residents of Pokénchi will gather on the World Hobby Fair stage! The residents from the popular show "Pokémon no Uchi Atsumaru?", which is currently airing, are coming to the World Hobby Fair stage! They will hold a fun stage show together with the Pokénds (Pokémon friends) that came to the fair! An extravagant guest will be there as well!?

There's lots of fun to be had involving the anime, the movie and Pokénchi!
You will also be able to play "Pokkén Tournament" entirely for free!
Come visit the Pokemon booth, marked with the Pikachu balloon!

For further information regarding opening hours, venues, access and the like, please see the Next Generation World Hobby Fair website

Source: http://www.pokemon-movie.jp/story/ and http://www.pokemon-movie.jp/whf16/