Map of the UUniverses
The United Universe is the home of all creatures good and evil. A long time ago, the United Universes were many different separate universes, one for Disney, one for WB, one for Dreamworks, another for Fox, another for Paramount and Nickelodeon, another for video games, and one for Anime, and many others. These many universes never knew about one another except through rumors passed around by crazy people and fanatics. Also, there was some kind of war called the Cartoonian War fought by some gods and demons as well as some giant bat called Chernabog. No mortal knew how that one turned out, except for the fact that Merlin of Disney and his sorceror army defeated the demons for good. After that, things went on as usual.
One day, when Wart of the WB universe pulled the sword from the stone, the release of the sword emited a large wave of cosmic energy that somehow brought the universes together, uniting them into one large SPORE universe and therefore allowing everyone to finally meet one another, and there was world peace at last. (aside from trouble from villain teams every now and again.)