I always think Arkham Horror is like Ghostbusters in the style of the '20s.
With the upcoming Ghostbusters III in 2012, wouldn't it be great if FFG grabs the license to do a Ghostbusters Boardgame in style of Arkham Horror?
They could change the Arkham Map to New York, the Police Station with Car and Gun to the Ghostbusters HQ with Ecto-1 and Proton Pack, Ancient Ones could be Gozer, Marshmallow Man, Vigo etc.
FFG could insert some of the AH Expansion rules like Personal Stories, Epic Battle to spice things up.
Also it wouldn't be a financial risk for FFG, because they just have to re-engineer an already existing game.