Dragonball Reborn is an upcoming 2018 live-action science fiction film strongly based on the Japanese Dragon Ball Z manga. It will be directed by Stephen Chow and produced by James Wong. It will be released by 20th Century Fox.
Both Justin Chatwin (Goku) and James Marsters (Piccolo) have signed up for at least two more films. It's uncertain if the rest of the cast will return for a sequel, they might for a higher salary.