Bad news for Batman: Arkham City PC gamers who are patiently waiting for the official launch of DX11 patch. It has been delayed, and the worst part is that there is currently no ETA on when it will be launched for public. According to the reports this delay is due to authentication that is required for pretty much every GFWL patch.
Last week an insider of Rocksteady leaked DX11 patch of Batman: Arkham City, and is fully playable, provided that gamers play in offline mode. Stay tuned for more details on this DX11 patch for Batman: Arkham City. In the meantime you can check out the comparison between the DX9 and the DX11 version of Batman: Arkham City.