In my comic I have the idea of the multiverse, where the same world repeats with differences that can me very small or extremely large. Initially, I was gonna give people from other worlds different physical traits. But that reminded me too much on the trope of humanoid aliens, so I reserved it to only a few extreme cases.
I was going to kill a high number of characters, but my friend convinced me otherwise. I'm still killing some though, after making them hopefully likable enough :3
Initially I made up names and explanations for many things, but then decided that it was too much and irrelevant. If it isn't relevant, I'll let SciFi take care of it.