The little buggers are back!
Nintendo has finally pulled the lid off of the newest games in their amazingly popular Pokémon series of games. The two new games, Pokémon Diamond and Pearl, have been revealed, as always, in the latest issue of CoroCoro Comics. The game looks like a traditional Pokémon game. The overworld, though it is now rendered in 3D, looks almost identical to the overworlds in prior Pokémon games. Battles are entirely two-dimensional. The game is scheduled for an "autumn" release in Japan. Online modes are not mentioned in the CoroCoro Comics article.
Thanks to Jonnyram on GAF for the tip.