User blog comment:James12708/Reapers VS. Forerunners VS. Angels from Darksiders VS. Humanity from Halo VS. Council and humanity from Mass Effect VS. Imperium of Man/@comment-50.80.96.33-20130112051002/@comment-1683193-20130112063330

And? For one thing, that's really implausible, also the Forerunners defeated the Flood, and the Reapers wouldn't make much of a difference.