On the subject of the extra scenes in Aliens, I feel like learning about Ripley's daughter is incredibly essential to understanding Ripley, what she's lost, what motivates her, why the time she lost in cryosleep matters, why Newt comes to matter so much to her so quickly, and especially why the maternal bond she has with the aliens in Alien Resurrection is meaningful. It adds a new layer of depth and pathos to Ripley that makes her a deeper more developed character.
Those scenes make the film *better*, but they're not what I'd call "essential". If they were, then the Theatrical Cut would be rubbish, which it isn't.
For example, yes, knowing about her daughter gives you a deeper understanding of Ripley's motivations. However, not knowing doesn't make her actions non-nonsensical. The nightmares, trauma, need for closure and general concern for the families out there is sufficient.
As I said, Cameron knows where to cut a film without ruining it. Where what Scott did to Prometheus felt more like butchery, Cameron's cut of Aliens was more like micro surgery.
I assumed there was some kind of damage or deterioration of her DNA and that of the alien but it's only one of the many flaws the movie had to explain why/how they needed her DNA to get the Xenomorph DNA in the first place.^By that point, the human genome would have been mapped for the best part of half of a millennium. I don't think any competent geneticist would have trouble distinguishing between human and alien DNS strands.
The only thing that makes any kind of sense is that Ripley's DNA was already mutated when she was ejected from the Sulaco.
Like I said, even fragmented, I can't see them mistaking one for the other unless they've been fused together. That's not something that happens spontaneously.
Besides, in light of what we've since seen in Prometheus, that seems entirely consistent with the technology.
I can't see the Engineers offering them much in the way of good sport.
Well unless the create some good sport for them, I mean they did create the Aliens so they could probably create even more horrific things.
While their motivations are obscure, I can't see them having a reason to do that. Hell, for all we know, they created the Predators too. They've certainly been around long enough and it'd account for a third race with the same basic humanoid shape....that is *if* I thought they exist, which I don't.
