There was a villain from the dragon ball z universe called dark Sol and he found out there is not just parallel dragon ball z universes. He found out there are much more universes then that totally different and he plans on taking every one of the strongest villains in each universe and make an evil army and you can't let him accomplish this or else the chances of winning is nearly impossible so you have to stop him and also he is making some universes fight each other and it is causing chaos for the heroes of each universe!

(That's how dark sol looks)