User blog comment:RayShepp654/How to defeat the Reapers Theories/@comment-1221773-20101031021231/@comment-1221773-20101101014005

Well, I tend to think the Reapers are moving towards the dark space end of a "back door", like a wormhole or a backup mass relay. That, however, is dependent on the idea that the Reapers are so far out in dark space that conventional spaceflight to the galaxy takes them way too long and costs too much energy to be viable, which I think is exactly the case. Because if the Reapers are only a couple years' worth of travel away from the galaxy, I don't see why they needed the Citadel relay to begin with.

Now obviously ME3 is going to take place while Shepard is alive (and likely not very many years after ME2), so if the Reapers are not just a few years of travel away, they must have some kind of shortcut, thus the "back door". If this back door is something the Reapers built, then logically it's also something that can be destroyed. If it's destroyed, then the Reapers can't use it to zip into the galaxy, and thus they are "trapped" in dark space, doomed to eventually run out of power (barring another back door or deus ex machina).

All this talk is frustrating now. What the heck is taking BioWare so long to announce ME3? The wait is killing me. I don't even care if all my theories are wrong at this point, I just want to enjoy the game.