User blog comment:James12708/Bioware Hasn't written themselves into a corner/@comment-4950455-20121110013520/@comment-4721065-20121111013951

Leviathans got themselves purged by the Catalyst and lost most of their specie when there were NO Reapers around. Shepbringer would eliminate every trace of them in less than a month. As such, the game with LEviathans as antagonists would be very dissapointing IMHO.

To be honest, the same "Shepbringer law" would apply to every attempt at making a sequel. The only way you could go around that in the Control scenarios is if some antagonist forces have managed to somehow hack/trap/neutralise enough Reapers make a sufficiently long game. Given that Reapers are supposed to number in tens of thousands, it would be WAY too hard to make something like that believable. Maybe Bioware should just say to to the Control players "your galaxy is far too awesome to require a sequel" and proceed with the Destroy and potentially Synthesis scenarios, given how little we know about the smaller-scale effects of Synthesis.