User blog comment:Kaloneous/Mass Effect 3 Ending DLC Denied and PAX/@comment-1752998-20120328115215/@comment-4043223-20120328161459

Probably copyright laws, Geoff Knightley would lose revenue if even a bit of it was shown so it's understandable I suppose, particularly so close after its release. In a years time such things would likely not be an issue.