Not sure if you watched that panel, but he was talking about the DCEU Earth as being a separate Earth from the Battinson Earth. I just think he was referencing a few of the DECU JLers to delineate from Battinson's world.
What's less clear is whether they will be going with 2 different visions with Snyder doing his thing on HBO Max (either as its own movie just to complete the set) or more movies if it gets the attention they want, and a different one for the theater DCEU movies, which, admittedly, does seem weird to me.