User blog comment:Arbington/ME3 Theories/@comment-1462101-20100630183731

Now, the Reapers don't have the element of surprise, and the Citadel can be fortified to protect galactic civilization. Apparently, when the citadel arms close, the station is impregnable. Even the reapers probably can't get passed it. For ME3, the galaxy might actually stand a pretty good chance.