Firaxis staffers have outed a new, multi-platform RTS from the Civilization developer, but it's not a sequel to Civilization Revolution - that's been shelved.
Apparently going for a hat trick, Superannuation found this one, too. Former Firaxis level engineer turned Vigil senior designer Chris Doyle makes a mysterious reference on his resumé to a "unannounced Unreal Engine 3 title (PC, Xbox 360, PS3) - in development".
Meanwhile, the resumé of character artist David Jones mentions his work on Civilization Revolution II, which continued "until the project was canceled".
Civlization Revolution would otherwise be a hot contender for a console-bound RTS from the studio, as it released on DS, iDevice PlayStation 3 and Xbox 360.
Super's past sleuthing skills turned up an unannounced sci-fi game in the works at Firaxis, although that could be a reference to a long-rumoured (and probably long-vanished) turn-based XCOM sequel.