Tom King took to Twitter to tease Batman art from Frank Miller, with the simple caption "Coming up in Batman."
Coming up in Batman.— Tom King (@TomKingTK) December 4, 2018
Art by Frank Miller. pic.twitter.com/stiuhAQ1ab
While it's likely that this is just a tease at a variant cover, King could be alluding to interior art from Miller, as he's done before with Jorge Fornes' art on Batman #60.
Miller is currently working with Rafael Grampa on a Dark Knight III spin-off called The Golden Child, featuring the children of Superman and Wonder Woman. But given Miller's recent track record, it's unlikely that Miller is actually working on the title and Brian Azzarello is instead.
Who knows. Maybe Azzarello drew the art in King's tweet.