User blog comment:Kaloneous/Mass Effect 3 Ending DLC Denied and PAX/@comment-4937645-20120407161512/@comment-4797093-20120407174226

Except they did say there would be only additional cutscenes as epilogue to clarify the existing ending. Meaning no new gameplay, and no new ending, meaning that what we saw was the actual ending.

If the IT was true, Shepard would still have to defeat the Reapers, followed by the true ending. And unfortunately it seems they have pretty much flat out denied that.