>>80364976DC Comics, and by extension the DC Multiverse is a fusion of several differnt companies concepts amd stories that were consumed and absorbed into a single entity.
National Comics,All American Comics, EC, Mad, Quality, Fawcett, Charlton, and Wildstorm all were bought out, and had there charcaters and lore merged into the new whole.
In the same way our Eukaryotic ancestors ate smaller Prokaryotes but insread of digesting them, incorporated them into our structure.
Our Mitochondria and Plant's Chloriloplasts are independent life forms with there own dna, trillions of alien species bound to our cells in a billion year union.
Jor-L,The JSA, Wonder Woman, Flash,Green Lantern, The Atom,Hawkman and Hawkgirl,Red Tornado,Mr Terrific Wildcat,The Atom, The Question, Blue Beetle, Captain Marvel, Dr Sivanna, Mary Marvel, Captain Marvel Jr, The Monster Society,The Wizard Shazam,The Rock of Eternity,Black Adam, Mr Mind,The Bleed,Carriers, Stormwatch,Midnighter,Bendix,Grifter,Tao,Daemonites,Helspont,Plastic Man, Uncle Sam and The Freedom Fighters all came from foreign narratives that DC now calls its own.
Its common to other "living narratives" almost every religion absorbed elements of local traditions and minor gods, Transformers absorbed GoBots... you get the idea.