So, in the end of the SU movie you see everyone eating food. You;ll see that they're eating pizzas. NOW, in the FULL SU intro song, it states that when they win the fight, they'll all go out for pizzas. DON'T BELIEVE ME? LOOK: https://www.youtube.com/watch?v=Miqml1ma6so Theme song: https://www.youtube.com/watch?v=h-Z7ytsEZDo