Back when the Arkham City figures from Mattel first came out I quickly got to work repainting or modifying them. I ended up with an impressive roster of figures based off of the videogame designs not to mention quite a few commission requests to 'fix' the Arkham City Batman from the two-pack with Two-Face. I'll start with the first ones I did: Batman and Two-Face.
Most noticeable was the 'arm mod' allowing him to bring his arms closer to his body and taking out some of the extra height so he could fit in easier with the other figures. I had quite a few Batmen sent to me for these mods as well as repaints and fabric capes but eventually, to keep in simple, I chose only to do repaints and capes.