Dai-Kaio's planet

Above heaven lies a planet where all the strongest fighters in Hades go to. On that planet lives the most powerful Kaio in the galaxy the master Kaio (Dai-Kaio). Fighters that die and get to keep their bodies come here to train with other fighters in the galaxy. Periodically master Kaio holds a 'galaxy tournament' with all the other Kaio's prized fighters competing for the championship spot. The one lucky enough to win gets to be trained by the powerful master Kaio.