I'm 99% sure that Black is Mirai Zamasu, who hates humans due to them creating destructive creatures like the androids...

I'm 99% sure that Black is Mirai Zamasu, who hates humans due to them creating destructive creatures like the androids. In the future timeline they wiped out most of humanity so he's killing the rest of them off and plans to do so for every alternate universe's humanity. It's the only reason why someone with Zamasu's lol signature would even be in the future timeline to begin with.

Black > Goku

I'm going to go with your 1% and say that's not the reason. What the actual reason is, I don't have the faintest clue honestly. The Androids stayed to Earth. Cell was a threat to the entire universe, but never managed to make it off Earth. In fact, in the future, he never even made it past his first form.

True

Why can't he just be Goku? Why does it always have to be some half assed stand in? or some stupid alternate dimension stand in?

Mainly to give him god ki I would think. Kais don't seem to get any stronger than what they already are at. So imbue gokus body with God ki, post results.

Zamasu has the same ki signature as black, or it's extraordinarily close.

Ki signatures are mostly accurate if I'm not mistaken, especially if people as powerful as Beerus and Whis are actually trying to find out someone's identity.


Black has a huge problem with humans specifically though. He thinks the world (universe?) would be a paradise if they didn't exist. Humanity at some point in time, or in some timeline or universe, likely did something to piss him off. Or he just thinks their lives are miserable compared to other races.

Who is Zamasu? I've only been keeping up with DBS through these threads

Kaioshin apprentice from Universe 10.

We don't know yet, other than he is a Kai who whiss mentioned.

The problem is in the future timeline even the other universes have an alternate history.
black might be part human
It's proven that hybrids get the most power when not going super sayin. Or something took place with a Kai similar to that of the old Kai.