IMDB cites 8 collaborations, but I could only locate 7:
The Red Danube (1949)
Annie Get Your Gun (1950)
Scaramouche (1952)
Showboat (1951)
Young Bess (1953)
Kiss Me Kate (1953)
Jupiter’s Darling (1955)
With Showboat, DP Charles Rosher was nominated for Best Cinematography; who had previously won for The Yearling and Sunrise. So this, alone, makes Showboat a Must Own for my interests. It’s WAC. And that, too, is why this announcement holds the promise of being visually...
Showboat (1929). It seems to me that there would be an interest in our having a BD of this first version, as well. So, will it be WAC or Criterion? Indeed, who of the two will make it happen?
Warner Archives may not have been able to put together this ideal package, as the original Showboat was originally distributed by Universal. Do note, I have no idea if Universal is still holding the rights.