If I can stay with Captain Marvel for a moment more (sorry, Shazam), Jerry Ordway (in my humble opinion) gave us the best modern day interpretation of the Marvel Family and the whole Shazam universe, during his run on the character. It was during that run that we find out about Billy’s parents, C.C. and Marilyn Batson.
They were archaeologists, and damn good ones. Before leaving their children orphaned at the hands of their assistant/assassin Theo Adam. Other noted archaeologists (before Indiana Jones and Adam Strange of course) back then, were Carter and Shiera Hall. During this pre-Rebirth period, did the Halls and Batsons ever meet? If not, they must have at least been aware of each other. Archaeology’s not that big a field.
During the time that passed before the first appearance of Captain Marvel, and after the Batsons were murdered, did the Halls ever look into who did in, two of their own? And is any of this even relevant anymore, since Dr. Manhattan altered much of the past to establish the new DCU? Curious as always, good sir!
Stay safe, be well.