All the tubes that extract the sera lead back to two tubes coming from the floating torso. Somehow, they're harvesting his bodily fluids - or something. So who is the blue guy?
My theory? Somehow, the operators of the facility have acquired a Kree... one of the advanced alien races of the Marvel Universe: http://en.wikipedia.org/wiki/Kree. Our floater reminded me - in a way - of the Kree Supreme Intelligence:
We can be pretty sure the Kree will be showing up in the Guardians of the Galaxy movie, as Ronan the Accuser - a Kree, at least in the comic books - is a major character. So perhaps this is a way to begin to introduce the aliens? On the other hand, my buddy Bill Gladman thinks the floater could be an Atlantean (http://ow.ly/uhPWG), specifically the character U-Man - an Atlantean named Merrano: http://en.wikipedia.org/wiki/U-Man. But I'm hoping it's a Kree.
That leads to another bit of speculation - whose base was that? Who ran the "Guest House"? If my guess on the identity of the floater is right, it leads me to believe it was a S.W.O.R.D. facility. S.W.O.R.D. is like the interstellar version of S.H.I.E.L.D. http://en.wikipedia.org/wiki/S.W.O.R.D._(comics) And? S.W.O.R.D. was invented in Marvel Comics Astonishing X-Men Vol.3 #6 by... Joss Whedon. Who has a little something to do with all this.