I don't think Arkham City figures would suit Sideshow's strengths. Frankly, they aren't the company I would go to for "gritty, realistic" characters. But as their Joe and Star Wars line show, they are very good at more fantastic and comic styled characters. I think it would work best for Sideshow if they focused on DC characters from the comics and cartoons. If Arkham City figures are to come, it should be Hot Toys that produces them.