If you say to people "you either tell stories about the New Gods all by themselves, or not at all" you're basically going to get "not at all".
I'm sorry, but if you're going to ignore Kirby's intent to end the story of the New Gods, then I'd rather it be done so I can see things like Scott and Barda hanging with other superheroes. Writers other than Kirby trying to tell "the ongoing story of the New Gods as a whole" have tended to do much worse than writers just using some of the more interesting characters as guest stars.