Cinema City Web has announced that the pre-order tickets for this summers Pocket Monster Movie 15 - Kyurem VS the Sacred Swordsman Keldeo (キュレムVS聖剣士ケルディオ) go on sale April 14th, 2012. General admission is 1300yen, youth admission is 800yen and a parent/child combo is 2000yen. Like in previous years, those that pre-order their tickets in advance of the July 14th, 2012 theatrical release have the opportunity to get a special event Pokémon related to the movie. This year the advance tickets will come with a coupon for "K", one of the movie's main Pokémon. Both Kyurem and Keldeo start with the letter "K" but the note was intentionally left ambiguous for now to increase speculation as to which one it will be.


Source: http://cinemacity.co.jp/wp/ccmaeticket/

I'm not sure what the 'K' stands for... I'd say not Kyurem, because you can already get it in the game, but...

1) it could be a special Kyruem
2) I'd expect the Keldeo event to take place through the Nintendi Wifi-Connection.

Then again, it would make sense that they'd distribute the movie's main Pokémon... so I'm not really sure.

Guess we should get more details pretty soon.