The Dream Lord isIf this whole thingturned out to be a dream I would shove a stick up Moffat's ass. D; Also is the Dream Lord a Time Lord? The ending of Amy's Choice was very ambiguous in that he is a part of The Doctor in a way, his reflection and all that...
a future incarnation of The Doctor (round about 15/16, I think. People have said that he's related or connected in some way to The Valeyard.