This appears to be a new Dark Eldar Warrior. This is the first I have seen of a model like this. It appears to be holding a heavy weapon - Dark Lance? I'm not 100% sure that this is legit, but at this point I really doubt it is fake.
I like it - they toned down the spikes and it actually looks kind of menacing. I have about 20 of the old Warriors painted up and it looks like they will mix in well with these new models - they aren't a HUGE departure from the old models, though the new model looks a LOT better than the old ones.