The HEROES face the most powerful ENEMY they have ever seen in the UNIVERSE.
Enemy
I am all-powerful! No one can defeat me! Hahahahaha!
They fight for a LONG time. Many heroes get BEAT UP or KILLED.
Goku arrives. He transforms into a more POWERFUL kind of Saiyan. The enemy is DESTROYED.
The heroes REST for a while. Then it all happens AGAIN.