User blog comment:Tanooki1432/Alternate Ending/@comment-2067525-20120311224436

"As for the Catalyst, I'm thinking it WON'T be the Citadel."

In my opinion the Citadel should remain the catalyst or at least part of it. It holds a symbolic meaning to pretty much every 'important' race as a sort of sanctuary, and having it be the catalyst was the only plot-twist that I actually really enjoyed and found interesting. All of my time spent on the Citadel in the trilogy, just to find out it was the driving force of a galactic super-weapon was pretty neat.