In Mass Effect 3, you get to walk in with a smug smile on your face, punch the Turian in the gut and say, "I told you so." Then all the races you have allied behind you (Geth included, with Legion's help) go and stomp the Reapers into dust. After that, the Reapers switch back to the Star Wars universe to fulfill that Sith prophecy that is in Fate of the Jedi series. Honestly, look it up. Star Wars is doing the same thing. Some ancient race appears every 50,000 years or so and wipes out all life. Copycats...