1. I think that fits better in the lore forum.
2. And i don't wanna pick on you or be rude so don't take this personal:
The Book is out since a few months now. The Datamining went on since a lot of months now.And now a few days beforer release you come ahead and say: Wait guys i think i figured tyrael gonna be the fallen star and Auriel gonna be imprisoned.
Thats like if a person today would suddenly speak out: Wait guys i think i just found out that germany lost World War II could that be true?.
The Book has been discussed a lot since the release, the datamined files have been discussed a lot by now.
To be honest if you would have searched and browsed a bit around the right places you could know A LOT more of the story by now.((for example how and which quest and which area the things regarding the different angels will likely gonna happen during Act IV))
So i just wanna make you aware that the topic you are bringing up will be totally boring and obvious to a lot of diablofans. You seem to completly have missed the ongoing theorycrafting on the world and story which happened here a lot among the last monts.So don't expect to get a lot of answers but from people who are also not so very familiar with the story.