I don't totally buy the idea that these beings spawned us.
What I don't get is why anyone in the movie would think we were created by the Engineers. Granted, they proved this with DNA once they arrived, but prior to the launch of a trillion dollar mission to deep space, what lead anyone to this idea?
I don't recally anything in the cave painting that would even remotely suggest or imply that these creatures created us. Certainly an implication that we were visited by aliens, but anything else is a stretch. Did I miss something?
I just can't fathom Weyland pinning his hopes on finding a way to stop his death based on a few cave paintings.
And I could go on and on about mankind's mission to meet sentient alien life for the first time--one believed to possibly be our creators--being crewed by a bunch of wreckless idiots. But I won't.
This movie might take the plot hole crown away from Star Trek (2009).