MovieStarPlanet 2 is a new game in our universe, and both MovieStarPlanet and MovieStarPlanet 2 will co-exist for a long time. We will continue to release themes and maintain MovieStarPlanet, while we also develop MovieStarPlanet 2. Just like we also develop BlockStarPlanet.
You might also have noticed the BETA on the MovieStarPlanet 2 logo? It means that it is not a finished game and that we are still developing it.