I think the Stryker is a done deal, unless Kerry gets in and kills it while he guts the military. The Stryker is key to Army Transition and the Future Force and Future Combat Systems. Kill Stryker and you throw a monkey wrench into all of that.
In the end, the B-36 turned out to be a place holder for the B-52 Stratofortress. The Stryker is an interim vehicle holding a place for Future Combat Systems that haven't been invented yet.