The new series Dragon Ball Super will be written by creator Akira Toriyama himself. Toriyama is an active mangaka who has created works such as Dr. Slump and has worked in the gaming industry on games such as the Dragon Quest series and Chrono Trigger.
Dragon Ball Super will follow the aftermath of Goku’s battle with Majin Buu. At this time, there is very little information on the other villains Goku and company will fight. We can only assume that older villains like Cell could return.