Episode 1 of the up-coming Super Dragon Ball Heroes is just a few weeks away from its July 1, 2018 debut. A new video preview shows Super Saiyan 4 Goku fire a Kamehameha at Super Saiyan Blue Goku! In this anime, Trunks has been captured and grouped with dangerous villains on a place called Prison Planet. A new, evil Saiyan (who’s name is Cumber) baits his opponents to fight with him as Goku and crew stand against this new menace. Vegeta says “Is this a Saiyan, I’ve never felt such an evil Ki before! What’s wrong, Kakarot?!” Fu’s voice can then be heard “the most interesting experiment in the universe finally enters its main phase!”. Vegito turns Super Saiyan Blue and yells “Cumber, the fight’s on” and we can hear Goku say “Don’t Miss It”.
This is the official description for the anime:
Fu wanted to experiment, so he combined some planets into a prison and brought warriors from across time and space to carry them out. If they want to escape, you need to fight the other prisoners and collect “Special Dragon Balls”.
Goku Xeno came to investigate the disturbance and was trapped. He has the 1-Star Ball. Bodacious has the 2-Star, and the Evil Saiyan in bondage has the 5-Star.
Fu specifically recruited Goku and Vegeta from a Super based timeline by kidnapping Super Trunks while he was visiting his friends in the past. So now Goku, Vegeta and Future Mai are collecting the balls.
SSGSS is stronger than SS4, Bojack is defeated, and while fighting Evil Saiyan, Goku became infected by evil and became Super Saiyan (Berserk, but not like Kale). In order to escape, Coola teamed up with Trunks and became Gold while fighting Goku and Evil Saiyan.