The Box Office numbers don't matter. I blame the film not doing as well over the weekend due to the poor advertising and also the horrible Stallone film which really had very little in common with Judge Dredd.
The film is awesome, and in my minds one of the top interpretations of a comic book character out there. While as a movie, I can't put it up there with Avengers, Spider-man 2, or Dark Knight, I can put this up with the best of the cult transcriptions of graphic novels like V for Vendetta, Sin City and 300. In fact I enjoyed this film better than any of those, but I am more fond of the source material too.
This will get a sequel, there's no doubt about that, and this will become a cult classic because of Urban's great performance. They just need to make sure they can get him back for the sequel.