I designed a badge holder for vertical badges. I included a Batman stencil at the back of the holder but if the picture is the right size, you can become batman for a while!
I also attached an empty badge holder if anyone feels like adding another charcter to the back.
I also have one with darth vader, I used the stencil from this model https://www.thingiverse.com/thing:2589468 and scaled it down.
Might be printed on black filament for better results!