Along with the 15th movie, Kyremu and The Sacred Swordsman- Keldeo, new forms of Kyremu have been reviled from Junichi Masuda. These forms will be in the new Pokemon games that we have all been waiting for: Pokemon White and Black 2. They are known as Black Kyremu and White Kyremu. The release dates for these games in the US are unknown, but the Japanese release date is in June 2012. In the movie, the movie poster also shows the new forms of Kyremu being included in the movie.
White Kyremu: Reshiram and Kyremu mix. Type: Ice/Fire
Black Kyremu: Zekrom and Kyremu mix. Type: Ice/Electric