AND NOW TO YOU. Your theory makes no sense. I'm not sure if it is because you can't explain it well or because it legitimately doesn't make sense. A pocket universe is very legitimate but your explanation is not. Basically Praedyth is proof that there are multiple universes/timelines. If there weren't, when he got erased from existence they would not be able to bring him back no matter what they do because they would not remember removing him in the first place. So they simply removed him from this timeline. Knowing who he is they were able to bring him back into our timeline (in the TTK). That out of the way, since we know there are multiple timelines, the Vault exists in all timelines. It's the point at which everything intersects which is why we have the conflux of time. So when you walk into the Vault you're actually leaving your timeline. The void is the space outside of the Vault of Glass, it's not necessarily the space in between worlds, it's just that nothing exists outside of the vault when we are inside of it. The Vault when we are raiding isn't the same Vault when we are doing story missions. In the story missions you aren't surrounded by the void because you're in your own dimension and timeline. That's how people can send signals in and out via com channels. But when you're raiding it would be impossible to get on the coms with someone because in that dimension the only thing that exists is the Vault. If you're confused about how two different things can exist in the same space at the same time, it's because of how the particles are vibrating. If two of the universes vibrate at the same frequency, they end up colliding and destroying one another. So while they vibrate at different frequencies Universe A can exist in B and C and so on an infinite amount of times. If you start in Universe A and go to the vault, it's possible to leave the vault and be in Universe B if you're vibrating on that frequency which is entirely possible to manipulate (esprcially for the Vex). But for all intents and purposes you go back to your own universe because that is the easiest one for you to go back to because it is your universe of origin. Take note, aside from raiding, you always get into the vault by some cause from within our universe. So when you go in you're going into our Vault of Glass, not the raid Vault of glass. When you raid, you send a signal that opens the "Convergance" Vault (the vault that is in a pocket universe) and you enter it. That is one of the only ways to get into this specific Vault. Going in it is one door leading to two different (but the same) places. Going out it is one door leading to an infinite amount of places. Now back to Kabir and Co. They all got lost in time. They weren't completely destroyed. Why? Because matter/energy cannot be destroyed, only changed (in this case moved/displaced). Remnants of them were scattered throughout time and space when they were removed from our timeline. Kabir used the last of his light to make the relic and put it in every single Vault of Glass in every single reality for the soul purpose of defeating Atheon. Because when you step away from the video game, the reality is that the only way to get out of the Vault is either to be allowed out by the Vex or to defeat the Vex controlling it and leave. Without the relic, you can't beat the vex and you can't leave. That's why you wipe when you lose the relic. Pretty much everything in the Vault will make you cease to exist. If they don't kill you. They keep you prisoner and you become aware of the timelessness and imprisonment. But as far as people on your timeline are aware, you never existed. The only reason stuff like the weapons and gear being references to the people in the vault is becsuse magic. This game is science fiction and magic put together. The Guardians powers aren't some sci-fi technological know-how, they're "the light" which essentially is magic. Magic is limitless but still needs to abide by the laws of physics and so does the vault of glass. VOG and the Vex simply manipulate physics to a degree that is very difficult for humans to understand. As for Praedyth specifically because we have a mission involving him. What could have happened on his end was the following: He was stuck in an eternal loop where he is doomed to fail. He is constantly trying to achieve his goal but fails and repeats the process again and again and again. He's "skipping through time" and he continuasly hasn't failed yet, but has failed, and will fail again and is entirely aware of the situation he is in. The Taken come to -blam!- shit up and the Vex retaliate by getting Guardians to come the only way they know how: using a guardian in distress. So they take Praedyth from his "cell" and place him in our timeline. This allows him to send out a com signal to ask for help. The Guardians come to save Praedyth from the Vex who actually are getting you to save them from the Taken. As soon as you defeat the Taken in the Vault, the Vex remove Praedyth from our timeline again and at some point leave him for dead in our Vault of glass centuries before we got there. There is no actual evidence of the skeleton being his and if it is how much time passed in Praedyth's perception between the point where we last hear from him and he dies. The latter is very important to consider because he may come back in our timeline's future. The Vex basically gifted us by letting us know that Kabir and Co existed but didn't actually release the survivng members. The scary thing is the Vex couldn't fight the Taken and needed our help to save themselves.