Development started during 2005, when one of the guys in the creative department of their company said: "How about we have a fighting game with every character? Our sales will go up the roof!" So, the game devs go to work on it (First, they asked permission to every game company for the characters and stages, and whatever got an OK, they were in). They also worked on graphics and gameplay. The game will be so big, that 3 departments are working on separate parts of the game! In Comic-Con, they announced it will probably take up 2GB in a Xbox, but that was during a beta test in 2007. They estimated the released version will be about 1GB instead of 2GB.