I'm thinking of doing a Monument Mythos fan series about the end of the world. But I don't want to reuse the recurring character from the Horned Serpent. Can anyone give me any ideas on what I could do?

I already have the idea for an alternate history side where it's about politics and the first female president, but not a liberal one. Instead, she's a conservative one, and she's Phyllis Schlafly alongside her vice president, George Murphy (former actor). The series would cover the period from 1972 to 2036. But I have no idea what I could do to make the end of the world original. I've thought about doing something that references Y2K in 2036. But I don't know if it's a good idea to take that or do something more original. People like James Dean could be mentioned, or I even thought this could be part of the Montyverse. But I wouldn't know what to do about it.