On Gateworld.net, they have posted an article based on Joe Mallozzi's blog that hinted at how the writers and producers were going to start the movie Extinction. Apparently Atlantis has a virus in the computer that will start the self destruct sequence if Atlantis is taken out of the Pegasus galaxy. There is a race against time trying to get Atlantis back before the whole place goes up. You can read the article here:
I must say that this is a bad idea. If this is the best that Wright and his bozos can come up with, then it's probably best that the Stargate franchise has ended.