Alien: Covenant - Epilogue: Advent 2017

Watch this after Alien Covenant

I do not care about David and the aliens did not need an origin story, and canon can't even stick to this, so it's all a big pile of nothing for me

SPOILERS
This one...is key to understanding...all of them -- the, "Alien," movies. And, that David sent Earth a message (and that it was received) telling them, AND warning them, of what he had created...what would happen if they chose to retrieve it.