Prologue(BU)

2 years passed since Goku's departure. The Z fighters managed to rebuild the Earth to it's past glory. That day, the Z fighters(including Mr.Satan) reunited themselves to discuss about what to do next.

"Now that one of our best fighters is gone with no guarrantee of return,"declared Bulma,"we need to get our actual fighters stronger. The episode of the Shadow Dragons just proved us how powerless we are without Goku or Vegeta. When these two will be gone for good, who will protect the Earth? That is why, I propose we establish a training program so that when the next threat arrives, we are ready for it." Everyone nodded in agreement. Vegeta stood next to his wife:

"From now on, all those with Saiyan blood in their veins shall train to acquire new levels!" He then designated each of them, one after the other:

"Gohan! Even after our fight with Majin Buu, I felt that you haven't revealed your full potential yet. You shall train to reveal it! Trunks and Goten! You shall work on your individual power AND on the fusion