How is new the saiyan in straitjacket from the Dragon Ball Heroes anime called? They released a new Dragon Ball Heroes trailer of the new anime and there is a saiyan in straitjacket. Is it known from the videogame or some japanese magazine how this saiyan is called?
The "evil saiyan"'s name is Kanba/Cumber.

You can find multiple news site talking about it today.
For example comicbook.com and otakukart.com.
They all reference this tweet.