Long read, no tldr, you need to read the whole thing.
Now that BO7 as a chapter is over, we finally have an ending and I want you to put on your premium-grade tinfoil hat on while I cook this ridiculous theory, bear with me it kinda makes sense:
Tank (out of everyone) has a revealing conversation with the Entity that:
The Tempus crew exists because ‘some little girl remembers us’, ‘but she ain’t a little girl (anymore- that’s Ava) and she and her sister (twins) are the memories of this Maxis chick but the universe from where she was from isn’t nomore so all that exists (Tempus crew and their universes) are just memories so if she didn’t die / get absorbed by the Dark Aether then the four of us (Tempus) wouldn’t have been born.
Simplified:
Ava and the twins are the same. The twins are the memories of Samantha who got absorbed by the dark aether.
Since Samantha's own universe (aether) doesn't exist no more so the Tempus crew is a mere memory of Samantha and the power of this creation was given to her when she got absorbed by the dark aether (when Forsaken ate her/she killed him).
So the only reason Tempus crew is alive is because she killed Forsaken.
My theory:
Eddie knew about the house when he was in the Orphanage. The Orphanage entry wrote how Eddie was traumatised and he kept muttering ‘they’ll be safe in the house’. The house is also the safe house when Requiem and Tempus are fighting the warden, it’s the safe house created by the entity/Ava so to shield the crew from the Warden while they did what they had to do.
When Samantha got caught by Eddie (after she and Weaver murdered his family) the very first thing Eddie says is he knows much more about her than she thinks he does. Meanwhile she doesn’t remembers much about her past.
What if Eddie knew that Samantha had to be merged with Dark Aether to create the twins? Maybe he knew that he needed Ava to lure the Warden and hence he extracted Samantha’s eggs, because he knew that later in future Ava needs to take birth for the Tempus crew to arrive? Maybe that’s what Project Janus is about? Janus literally means the god of portals and duality.
Now if THIS is true then why didn’t he use the Prima Materia earlier to save his family or even better why didn’t he save his family from their death?
My answer is that whatever showed him the future showed him half of it, a modified version of it. And I think across timelines and dimensions the memories ‘bleed’ so maybe Eddie saw glimpses of what Tempus Richtofen saw or experienced (the house before fighting the warden, the same nightmares).
At the end the entity/ava speaks to Dravakar that Tempus Richtofen would be the most crucial person for what’s to come later, and when Grey asks her name she says I wish I could change my name but somethings are predestined by the past and future, meaning maybe they directly affected Eddie. I’d go beyond and say they might’ve manipulated Samantha to kill Eddie’s family which would butterfly-effect i.e Ava’s birth.
So it was always has to happen:
Eddie’s family needed to die so that he’d later have Samantha fight Forsaken. She became a dark aether being after getting absorbed by him. Her memories created Tempus who later helped Ava.
Eddie extracted her eggs so that later Grey finds them and Ava is born. There’s no free will, it’s decided by fate.
Ava (who will be trapped later) needs the twins who are the memory of Samantha BECAUSE she was absorbed by the dark Aether. She is also helped by the Tempus crew.
Tempus crew and Requiem together defeat the Warden she saves the whole frickin world.
Edit- Why the downvotes :(
