actually its not a "sequel" in the normal sense. It could you say just be an extension in that its more of the books by Frank Miller. Its not like its made up junk just to say "we have a sequel" they could have put all that they are making into the first one and had one god awful long movie. I know one of the stories is the book with Clive Owens Character Dwight taking place before the one we saw in the first Sin City. So they say some older characters who died can be back due to the timeline. Dont go by rumours and this was announced like 5 months ago its not really new.