I don’t see it available for preorder on Amazon or Instocktrades yet, but Penguin is listing the Kupperberg run that bridges the Drake and Morrison runs for September release: http://www.penguinrandomhouseretail.com/book/?isbn=9781401298838
Not on Things From Another World (tfaw.com) yet, either.
I’m hoping the Bronze Age doesn’t get very weird, but it does seem interesting that it includes a “never before printed story” and it is the complete Bronze Age collection. I don’t know why I didn’t respond sooner, but hopefully it will still be released. Here is the Amazon link in case people don’t have it: