Engineer Homeworld Landscape

Okay, saw all my other posts about Paradise-Alien connections were all wrong. Here's my Prometheus-Paradise theory: Consider this, what if Shaw and David find a literal Hell awaiting them? Not in the fire and brimstone way as much as an adulterated Garden of Eden? Something happened on the Engineer homeland, hostiles from "somewhere else" came in and annihilated the majority of their forces and resources. In their hour of desperation, they sent an expedition on LV-223 to make a weapon that the would overmatch the enemy (the black goo). They needed test subjects to make sure this weapon was powerful enough to get the job done. Thus, they go to the human race with star maps on how to find the weapon facility. After all, one of the taglines for Paradise is "The path to Hell, is pathed with good intentions". Whatever Scott decides, I think its fair to say that Shaw and David, but in particular Shaw, are in for a very terrifying revelation.