Supernatural is one of the boards we've done with just the two characters
. Another one was Elementary (board is now closed but the customisation still is there if you want to look at it). With Supernatural we had the Impala to fill out more of the graphic. Then Elementary works really well with the Manhattan buildings in the background. That's why I asked earlier if there was something which could go in that space which connects with the show at all. It could be anything; a symbol, location, object, them again representing their powers more, ect. (sorry I don't know the show so I have no idea). But if there's nothing really then guess the team just have to be creative