Update: Karl Urban has told New Zealand film show Reel Late with Kate that he is Judge Dredd' saying:
"Yes, it's true, I am the Law". He added that he was "thrilled to bits" about landing the role.'Star Trek' and 'Lord Of The Rings' actor Karl Urban has been offered the role of Judge Dredd in the 3D remake 'Judge Dredd' movie. Pete Travis (Vantage Point) is attached to direct the 3D film with a screenplay by Alex Garland (28 Days Later).
Karl Urban on Comic Con 2010 Judge Dredd Rumor