Creator Backlash: According to the example on that page, James O'Barr later regretted that he "glorified revenge".
James O'Barr: I wish I had never written the goddamn thing.
However, the Special Edition released in 2011 shows that now, O'Barr has come to terms with the work, seeing it as about true love and the importance of self-forgiveness. This is thanks in no small part to Brandon Lee's fiancée Eliza Hutton, with whom O'Barr became close.
As mentioned in the description, what started the whole thing.
After the death of Brandon Lee in the movie, James O'Barr said in an interview that writing the comic had been a vicious, self-destructive process and not at all cathartic, and that, combined with Brandon's death during shooting the film, made him "wish I had never made the goddamned thing."
Old Shame: O'Barr has said that he regrets Writing the comic now, both due to what he now feels is a glorification of revenge, as well as the death of Brandon Lee due to the movie adaption.
The film series:
Actor Allusion: Top Dollar (Michael Wincott) has a nice collection of swords and knives. The centerpiece of his collection, and also the one he uses to execute a man through the neck with, is an elegant rapier. His character in The Three Musketeers (1993) had both an elegant rapier, and he executed a man in the same fashion.
Creator Cameo: James O'Barr is one of the looters who rob Gideon's in the first movie. (Long blonde hair, carrying a small tv.)
Executive Meddling: City Of Angels was hit by this pretty hard, 20 minutes worth of character development and important plot points were edited from the film, the only way to see the full version is on Pay Per View or bootleg.
Mean Character, Nice Actor: Funboy's actor Michael Massee, who accidentally shot and killed Brandon Lee, was so devastated at causing Lee's death (which was in no way his fault) that he took a year off to recuperate. According to a 2005 interview, he still has nightmares about it.