9. Martian Manhunter Loves Oreos
Of all the possible entries on this list, why did I put this one front and centre? Well… because it’s goofy as hell. The idea that we have this incredible, bold, striking, largely emotionless character on the Justice League, so powerful from the outset, and he also bloody loves Oreos (called Chocos in the comics for copyright).
His love for Oreos is a lovely in-joke in multiple comic panels, and has become a source of great comic relief for the otherwise stoic Martian. If this is shown in a future film, it could be equal to the sweet levity we got with Wonder Woman discovering ice cream.