Along with that Gazette article making it clear he's real and not an in-universe fictional character, we got trunks, and we got a friend:
Genuinely love the implication - even if an implication is almost certainly all it will remain - that the gritty, tormented Pattinson Batman wears heavy plate armoring and works 'realistically' low-tech, while the Reevesverse Superman and Wonder Woman are just regular-ass comics Superman and Wonder Woman off having adventures in their own corners of the world.
(Which, to editorialize further, makes infinitely more sense than the DCEU having an incredibly toned-down 'realistic' Superman while Batman gets the regular Batman costume and used to hang out with a pantsless Robin. If you're doing the dichotomy, have the fantastical characters be the fantastical ones!)