User blog comment:JediSpectre117/Citadel DLC, conspiracy, Thoughts?/@comment-3046679-20130226230236/@comment-1679409-20130226230551

It will turn out that Mass Effect and Halo take place in the same universe. Things that we had written off as Easter eggs or coincidences (such as the Pillar of Autumn in ME2 or a Reaper in the remake of the first Halo game) will turn out to be major hints.