Imagine an alternate universe where the writers and artists at DC never got to form a DC universe. No crossovers were allowed. (Comic book) Batman and all related characters only existed in their own, self contained universe. Ditto to Superman, Wonder Woman, Green Latern...yadda yadda yadda.
How would these comics be different? Would they be generally better or worse than the path DC ended up taking? How would adaptations(movies, cartoons, games, etc.) be different?