It seemed like post KC ( due to its success) DC had seen them as an inevitable pairing once time goes by in most future settings because of the characters' close bond and natural longevity.
Someone mentioned Miller wanted to do a JL story in World War 2 setting. I'd love to see SMWW with their golden age power set done there.
I also want to read a Superman getting outed as the status quo and staying outed. Think Truth but with his powers. And it will clearly show an ID does not define any hero's morality or choices. It would make life just that bit more challenging because he could not hide or lie any more to the public and would have to, like any person subject to the limelight or trying to create change in the world, deal with the good and the bad fallout that comes with that. A Black Label would be great for that. Many heroes these days have successful stories without secret ids. Of course Diana would be a perfect foil/ partner for this setting.