Here is an excerpt from Bluesnews.com.
New Wolfenstein Game?
[Feb 09, 2013, 3 pm ET] - 44 Comments
A clue that a new installment in the Wolfenstein series of supernatural World War II shooters is underway was discovered by Polygon, making a case that the game is in the works at Machinegames, a developer acquired by ZeniMax in 2010. They report a cache of Julian Beeston's website where the composer's résumé lists "ADR Engineer, Production Sound" on a Wolfenstein project in development at Machinegames. They also note that it has already been announced that Machinegames, a Swedish developer formed by vets of Starbreeze, "is working on an unannounced project for ZeniMax publishing subsidiary, Bethesda Softworks, that is being built on id Software's revolutionary id Tech® 5 engine technology." Thanks Gamer's Hell.
And here some links about it from other game sites.
All I know is that they BETTER be making this one similar to RTCW with old school FPS tactics. Not Wolfenstein 2009 with those stupid modern FPS tactics like Call of Duty.