The trailer is now online for the Cromartie High School live action movie. It looks pretty buggin'!
Official website: http://www.kurokou.com/
While there are many a violent scene in the Koroshiya 1 manga, there's one that stands out in my mind. I don't know that I can describe it without being too obscene, but involves a man falling from a building while spraying blood from, er, both ends. The scene isn't in the movie.
I really don't see what's wrong with the symbol. And I'm a huge Superman fan. I think he looks awesome.
As for the villains, Superman wasn't originally about fighting powerful supervillains. He took down petty crooks and bank robbers and the like. What's the need for special effects?