[quote=@CaptainManbeard]
<Snipped quote by Havoccultist>

Yeah, or if we ever get to a point in the plot where your antagonist character is defeated or killed, you could then bring in a good version of that character from a different timeline who then inherits their Quantum Shard or something. 

As to your other question, it's totally fine to come from places other than Earth or Earths that are radically different. For instance, there could be timelines where humans or humanoid life developed on other planets, and timelines where non-human humanoids developed on Earth. There could be Earths similar to the movie Bright, where elves, orcs, fairies, etc exist in modern society. 

What did you have in mind?
[/quote]

Probably something fantasy themed, but nothing concrete as of yet. I was just curious to know what the scope of the timelines was. How crazy you could get with it, etc.