Rob McKinnon is a known concept artist in the business and he has been posting some of his concept art for Batman v Superman and Justice League. Metallo was apparently considered in Batman v Superman at one point and it looks to be Scoot McNairy’s character, Wallace, who lost his legs in the battle of Metropolis. Seems cooler than an exploding wheelchair.
Then we have Justice League concept art that gives a look at Lex Luthor’s prison cell. We do know there was a deleted scene where we see Luthor being broken out by Deathstroke, so that kind of stings.
