Ensemble Dark Horse: Margret Stanson, despite only two major appearances, has become immensely popular with readers thanks to her sympathetic circumstances and her role in supporting Red X and the Outlaws. Her second appearance had her staring down Batman of all characters, with some finding her to be a Memetic Badass because of it.
Rescued from the Scrappy Heap: Due to his adorable brotherly relationship with Jason, Damian is considered more likable to the readers than his divisive comicbook and animated versions.
They Copied It, So It Sucks!: A major complaint about the confrontation between Jason, Nightwing, and Batman is that it's lifted directly from the comics and animated film almost word-for-word.
