Kiel Phegley reports that "While early on in the process, Adams had spoken of having Frank Miller doing dialogue for the story
, the artist will end up writing "Odyssey" in its final form from start to finish."
So Frank Miller isn't dialoguing Neal Adams' series after all. It makes sense for Neal Adams to dialogue it since it's his story, and I know that Frank Miller is busy with his own projects, and Frank Miller has encouraged artists to write their own material for their own projects. Frank Miller said in Amazing Heroes #102 of David Mazzucchelli and Bill Sienkiewicz, "Both of these people should write their own material because both of them have particular visions that should be pursued purely, without anyone else writing the script."