Adolf Hitler's ghost returns for Darth Vader and challenges him to another rap battle. Then after the rap battle, he hired a group of ERB villains (Stalin, Genghis Khan, and Napoleon Bonaparte) to kill Darth Vader. After they did, it causes changes to the space-time continuence, meaning that the Nicktoons, Sci-Fi Gang, Hetalia characters, the TF2 gang, and everybody else never met each other, causing all of the other game to never happen. Then Hitler and Stalin becomes a two-headed future king, Genghis Khan becomes the guard of the door to their castle, and Napoleon Bonaparte becomes a leader of their army, which is the Evil versions of the Nicktoons. So it's up to the Nicktoons, Sci-Fi gang, Hetalia Characters, the TF2 gang, and everybody else to work together stop Hitler and Stalin.