Dragon Ball United

Dragon Ball United (ドラゴンボールユナイテッド) is a fictional Dojinshi series by a artist called Tangent. It has been published on DeviantART, as well as several other fan manga sites. It takes place several years after the events of GT.

Plot
Several years have passed since Goku, the mighty Super Saiyan, left Earth with Shenron. The Z-Fighters have seemed to except his loss and have returned to normal life. However, things quickly go awry, as Future Trunks returns with a warning. A powerful knew threat is approaching Earth, and the only person who can stop him is Goku.

He must be brought back at any cost. But the Z-Fighters have no idea how to bring him back. Until Piccolo comes up with an idea. Apparently, when Kame was ressurected during the Namek Saga, along with Piccolo, another set of Dragon Balls where created as well.

These balls, the White Star Dragon Balls, also come equiped with it's own Dragon, Marak. Using these, they quickly ressurect Goku just as a new threat arrives....

Vulgor Saga
The first saga. A mysterious Saiyan arrives on Earth, determined to best Goku in a fighting match. However, there is more to this Saiyan than meets the eye...