Justice Society of America.

Disregard anything that happened during the whole "Earth 2" run. Keep the team as their mid-40's lineup and have them get dropped into the middle of the current DCU timeline once Doomsday Clock ends; something about not being able to return to the past once it's over.

There's plenty of character work to move through as "people out of time" adjusting to modern life, coming into contact with descendants of their former enemies, etc.

It would be an interesting dynamic of the "good ol' days" superheroics of the JSA versus the modern JLA.