The ending of season 2

Why do you all think you know who has decided to come back now?

I personally think, based off of what’s been said so far, that her continued stay in heaven may be threatened by the fact Charlie has basically pacified hell and made them believe in redemption .

I believe her deal was she stops leading hell to possibly rise against heaven in return for her being allowed to live there, hence why Sera suddenly after 10’000 years believe hell will rise and kill them all 7 years ago.

Things that point to this are such as Vox mentioning how she united Hell and mentions of sort of starting a small rising against heaven just before she disappeared 7 years ago.

Along with this it would make sense why Lute went to her at the end of S1. As it’s basically a “well the deal was hell doesn’t rise against us for you to stay here and now look Adam’s dead so you better do something else you won’t be here anymore”

Sorry I’m not really good at explaining what I mean. But I hope you get my idea

What do you all think, about this idea, or any of your own?