Every game in the WWE SmackDown vs. Raw series includes a roster of "superstars" and "Divas" based on superstars who compete for WWE. Every year, WWE acquires new superstars and releases old superstars. As a result, every time a WWE SmackDown vs. Raw game is released, the new superstars are added into the game and the old released superstars are removed from the game to reflect the changes in the actual WWE.