The official Japanese Pocket Monsters movie website has updated with the first news for the 13th movie scheduled for release in July of 2010. Last years movie, Arceus - Towards the Continuum of Conquest (アルセウス超克の時空へ), was based off locations in Greece. For the new movie, director Yuyama and crew have begun scouting Belgium and the Netherlands as possible locations for the new film.
Pictures above: Director Kunihiko Yuyama (湯山邦彦) eating a Belgian waffle and Pikachu sitting on the Magere Brug (Skinny Bridge), a bridge that goes over the Amstel River in the city centre of Amsterdam.
Source:
http://www.pokemon-movie.jp/rokehan/01.html