Welcome to Earth-304d!
So far, I have always taken the Arrowverse as my template for DC fics, but my alterations to it have been... growing more and more. Now that I'm reading the comics, I came to the conclusion that instead of altering elements of the Arrowverse, I could as well create my own Earth in this multiverse and cherrypick canons from the Arrowverse, cartoons, movies and various comic runs, give them my own spin and blend them together with my own takes and make it an Earth. Which also means; no specific background knowledge of any one comic run or adaptation needed, all elements that will be important for the stories are going to be put into the stories.
This is going to be a collection of oneshots all set on that Earth. Which means that some of them very directly connect, others may show no connection at all because these heroes don't cross paths. On the overall, I want to tell the stories of my favorite heroes and how they came to be and what alliances and teams they join on this altered Earth. There will be some romances, but the main focus is on the found family team feels of it.
I want the stories to work as standalone oneshots, so you can just pick which heroes' tales actually interest you and ignore others, while I also do want the stories to tie together through cameos and crossovers (i.e. Justice League) in a manner that's supposed to work without requiring full knowledge of what the other heroes have going on individually.
Heroes this Earth is particularly going to focus on include Superman, Wonder Woman, Aquaman, The Flash, Supergirl, Batwoman, Batman, Green Arrow, the Birds of Prey and the Justice League.