I have my own fanfic idea.
The Zamasu Zeno is actually evil, and corrupt the head angel. This leads to the good Zeno running to Goku, and forming a resistance movement, because "Erasing myself would erase everything, including me", or some such.
Jiren and Broly would be there. Whis and Vados would reveal Whis and Vados are half of a whole being, and each universe is like this setup. Goku and Vegeta would, of course, fuse.
Universe 6, 7, 11, and the one with the awesome death from the anime would be in the resistance. There would he fused Whis/Vados against the head angel, a massive God of Destruction free for all, with the other angels opting out of combat, as they look on in disapproval.
Eventually, Gogeta unlocks UI, and helps Whiados, as he starts to lose. It works, until Zenos guards join in, each as strong as a fused angel.
In the end, the resistance slowly becomes overwhelmed. All hope seems lost. Until...
Mister Satan.
Keeping with tradition, it's the unlikely hero, Hercule F'n Satan, the best character in all of Z, who saves the day.
Whether by somehow diffusing the situation, or simply landing a Hercule punch, I haven't decided (It's not like there isn't some question on the Zeno's physical stats. I mean, they couldn't even see the Gods of Destruction. 😛 )