The Third Game: Pokémon Platinum

Although it is not confirmed 100% true, there is rumored to be a third game, Pokémon Platinum. It is supposed to be released in September 2008 in Japan. Updates from Diamond and Pearl include:

• New Eighth Gym Leader
• Underground Wi-fi
• Battle Island (similar to Battle Frontier)
• New Legendary Forms

More info to come. To learn more, go to http://serebii.net/platinum/, or http://www.pokemon.co.jp/special/platinum/02.html IF you can read Japanese (This is where the rumors come from).