User blog comment:LilyheartsLightning/Citadel and Reckoning DLC announced/@comment-1679409-20130222042742/@comment-1679409-20130222213915

To elaborate, one thing I certainly hope is that they address the question of why the Reaper strategy required the keepers when the Catalyst was there the whole time. Hopefully, this will be better than the explanation I've heard so far: that the Catalyst wanted to take a hands off approach.