StarCraft II will feature the three races of the original game — Protoss, Terran, and Zerg. It has been announced that these will be the only races in the game. In addition, the replay function has been greatly improved. Blizzard is also planning to broadcast StarCraft II multiplayer matches in North America.
According to its creators, StarCraft II is designed to be the "ultimate competitive real-time strategy game", and as such, it focuses more heavily on the multiplayer aspect when compared to the original StarCraft. The changes includes overall improvements in Battle.net, new matchmaking mechanics, and a new ladder system.