User blog comment:Legionwrex/Reaper vs thresher maw, who would win/@comment-3097746-20110413041358/@comment-1900300-20110413153026

It is in the final game, but not entirely as a cinimatic. The start will be a cutscen but the idea is it will be happening in the background while Shepard walks around the scene, persumably to plant a massive bomb, get out there and then kill them both. Think at the beginning of God of War 3 with the titans fighting in the background. something like that.