Does the (Blue Guy) transformed person commandeer the Prometheus and ram it into

Nope. Not unless Captain Janek is prone to unprovoked panic attacks. That seems not to be the case.

mmmmm... mmmmm... O.k. just wondering! But more good omments upon this would be most welcome...

Is it Fifield that is in changed form upon the Prometheus though?

There is a guy alien-loooking on the Prometheus and I just want to know who it might be.

It sees as though there may be an element of human left if that thing is a human transformed into a bio enfineer to be eventually space jockey due to his infection with the nano-worm "oil" stuff...

Yes, it's Fifield. If you want to see what he turns into, look up the HR Giger "SJ Mural" with two figures, a humanoid and...something else.(SPOILER!) If you want a crash course in what's been discussed thus far, it's best to look at as many different trailers as you can. Welcome!

Why would a transformed human help Shaw?

I'd like to know that too!

Dont think so. Must be cpt janek who Did it because shaw and vickers told him To do that to stop the derelict/juggernaut from heading earth.

Maybe Weyland tries to take it back to earth?

Where did the idea come from that Weyland would be on board? This is ghosting through the forum every week, but nothing, absolutely nothing in the trailers shows anything that would confirm. So it can only be from any of the "leaked" scripts, but we all now that the were fake, so why continue speculating?