Terminator 4 Cancelled?

This is some huge news and frankly I do not believe it at this point. UGO is reporting that an un-named crew member says the movie is being shut down. I dont see how a studio would shut down a movie with a powerhouse lead like Christian Bale playing John Conner and in a franchise like The Terminator. We as fans are gonna finally get to SEE the war... and with a good cast to boot. To go from having a cast, shooting having begun, or at least production and even having a release date (May 22nd 2008) to now being a dead film... strikes me as odd. Stay tuned for more and if you have updates let us know