Update: Warner Bros. just officially announced the North American release date: October 18. The publisher also confirmed the previously reported release date of October 21 for "Europe and other global territories." The game arrives October 19 in Australia.

Eurogamer is reporting that Warner Bros. has announced an October 21 release date for Batman: Arkham City. Given the site of origin (Eurogamer), and without any official news releases from Warner Bros. that we can see, we can only conclude that said release date applies to Europe.

We're following up with WB now to try to get more information about when we can expect Batman to come out where. Though if it were that easy to get that information, the Riddler's plans wouldn't have needed to be so convoluted.