In a very rare development. The third installment in Pokemon 5th Generation series. Pokemon Black and Pokemon White now have a series, Pokemon Black 2 and Pokemon White 2. While most fans were expecting a mixture of the 2, for the first time in Nintendo/Gamefreak game development, they will now have a series. The 2 games will release in Japan in June simultaneously. No news on a North American release, the U.S site says they will be "Coming Soon."
The U.S site also calls the 2 games "two incredible new adventures."
The official Pokemon Japanese website has been updated with news for this game. "mysterious legendary Pokemon" will make an appearance. The new Pokemon look very similar to the legendary Pokemon of Pokemon Black & White. Perhaps a merge with the grey legendary Kyurem. Of course, only further news can tell who these Pokemon really are.
The games which for now is called Pokemon White & Black 2 have been confirmed. Will be released for the Nintendo DS in June in Japan. This news was revealed by Junichi Masuda. Masuda revealed these games in a Japanese show Pokemon Smash.
Pokemon #646: Kyurem, Dragon/Ice type Pokemon.