More or less, I'm not so hyped about the vertical landing, especially for a design that will carry people and without an ejection system. But they got the safest fuel available that is for sure, still needs cryogenic for the oxygen but is safer.

Many such designs have a huge flaw: the fuel. We don't have a good way of producing hidrogen without high energy demand and it requires very low temperature for any significant amount to be stored. Basic 30-40% if the energy potential is wasted for production and storage. So it is a huge pain to work with it, this being the reason why it doesn't catch as a car fuel, it is to expensive just to have it and potentially dangerous. Now taking all of this in consideration and putting the system in a supersonic device that can suffer 10% thermic delation dosen't sounds a good idea, but who knows history favours the bold

They should lower their metric, like how your mother had went she made you.

"Farm animals have value" continuing in his head

This is probably a karma farmer so many more times.

So we back at only two groups again?

Well the implied idea is that the "future humans" not aliens, are manipulate time space using gravity. So they use the black hole as a portal and a battery. And the fact that they put him back after 75 years (I believe) have passed in "normal time" suggest he spent like a few minutes in the black hole. I'm not gonna do the entire math, mostly because I don't remember the mass of the black hole. So basic they manipulate the gravity in the black hole to create a space were he could survive and interact with the universe at large in normal time.

This works because the time dilatation inside the black hole stretches back in history, so "deeper" you go further back in history you ca see, and send messages, at least in the movie, we don't have any idea it would be possible. So after he sent the message they created a wormhole to bring him out, but the trick is that they can only bring him back and in the normal time, unaffected by the black hole, so basic he travel in the future from his perspective. So in this regard they respect the general relativity.

Is pretty hard to imagine and explain how this works, is hard core physics and I'm not that good at it :))

Stil a good boy, he needs only driving lessons

Not necessary, they could have use a nice casket for the funeral and burn the body without one.

"so tell me about yourself, what do you like to do for fun. I'm into hiking and nature but I also enjoy a nice evening whacking a movie"

"I like many things"

"Something in particular"

"Yes"