Is that the neomorph?

Looks good. A sad neomorph. :)

Or resting, like gramps-xeno did, when Lambert came for room service. ;P

Concept art from Prometheus

This is concept work of the Deacon from Prometheus but indeed the Neomorph has taken some influences from various unused concepts.

I have edited this one here...

To this below which i think is roughly what the Neomorph looks like

Guess excitement got the better of me, this time. Bummer! ;)

I compared it with the one from the trailer. The spikes need to be in the center and the "gap" on the head is missing.

Darn it. XD 

It looks like concept art so who knows? It looks like it needs a warm coat.