The Black version will offer the Pokémon Reshiram and a setting called Black City, while White will contain the “lush, green area” of White Forest and let you capture Zekrom.
Black & White will be the first Pokemon game in a long while to have an new storyline, this time focusing around the villainous Team Plasma, which represents itself as a sort of “Pokemon Liberation Front”. The game will also not only feature a day/night cycle, but a seasonal one as well, so there will be rare season-linked Pokemon to hunt. The game will also feature “3 vs. 3″ battles, a new alternate dimension land called the Dream World, and special online Wi-Fi modes that allow players to not only compete but engage in special co-op gameplay.