well he did cast aquaman ,mera and vulko ,so id at least give him that
and theres this
NEWSNewly Discovered ‘Justice League’ Concept Art Shows Early Aquaman SuitPublished 1 min ago on 24/01/2019 By John Garza
Aquaman Concept Art 0 Comments
Justice League Aquaman Concept Design
Recently released images have surfaced online that appears to show Aquaman in his traditional Gold and Green suit that would have appeared in Justice League. Concept Artist Constantine Sekeris has shared what he designed for Michael Wilkinson. What you’ll notice is the classic suit was always there, it was just reserved for Aquaman.
The similarities from this Justice League concept art and the final suit design in Aquaman are very telling. Many people, myself included, assumed Zack specifically left Aquaman’s original design alone. With this concept art, that appears to not be the case.
Check out the images below:
Aquaman Concept Suit Design
more here
https://dcfilmshub.com/newly-discovered-justice-league-concept-art-shows-early-aquaman-suit/
looks like there was at least a attempt by zacks team at a classic approach to aquamans costume for bvs or jl