I'd like to introduce you to another new Pokémon title, which should become one of the most anticipated Nintendo DS titles for this year. The Pokémon Company International and Nintendo have been developing a new Pokémon title with the aim to launch the software this year.

The cumulative global sales of all the Pokémon series software have reached 130 million. This new Pokémon software will become the first brand new Pokémon title in 4 years since Pokémon Diamond and Pearl, which sold more than 5.8 million units in Japan, was launched.

Of course, this totally new Pokémon title will include new fields of adventure and a number of new Pokémon living there. As a totally new version, it will contain various unprecedented experiences.
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Note: These games are set to be released in Japan sometime later this year.

(Credits: Thanks to Firestorm of the Smogon forums for posting the information regarding the new games.
Also, here is the link for the original info:
http://www.nintendo.co.jp/ir/en/library/events/100129/06.html)