There was actually a movie where a middle-eastern terrorist group summoned a basilisk, I think... or was it a chimera? Either way that's kind of close to the Taliban having giant robotic snakes.
As for alternate history, I have to agree with the cold war thing. I mean, if you're going to do alternate history, do it completely alternate like Insomniac did with Resistance, where the cold war was replaced by a war with an extraterrestrial uberforce and we had a surprisingly high amount of technology for the time being. It's better than "The CIA screwed up and we decided to claim that they started it."