There's another idea, one I didn't even think of at all.ZeroNeonix wrote:He doesn't have to. Baby has the ability to control people by leaving a part of himself inside of his targets. Baby take control of Goku Black and ironically use his stolen body for his own purposes. Imagine a mission Zamasu begrudgingly teams up with us to save Goku Black from Baby's control.
There's a ton of stuff that Xenoverse/Heroes could do with this new parallel that Baby Vegeta/Goku Black could have (again, both being 'evil, possessed' versions of our titular duo), that I cannot see them passing up the chance to play with it a little bit in some way.