The Amalgam universe was basically the Marvel and DC universes merged together; it was Earth-9602, I believe. The last we hear of it was in DC/Marvel All Access and apparently it still exists (although considering the current events going on at Marvel, it probably got wiped out...) Now the climate has certainly changed since the late 90's, but if Marvel and DC could work together would you want to see this universe return?
And if you do, what would you want to see from it? Which character mash-ups would you want?