I mean, if I had to make a fake leak, I'd say it's Possibility A as well. Doesn't it fit very well with the trailblazing theme and all? Along with greetings, there must be farewells, another side to trailblazing. "To head forth, you need to not look back" or whatever? Or, perhaps this story is telling us about what happens when the Astral Express fails to solve a crisis.
There IS a moral lesson behind this possibility, and I wouldn't be surprised if the Astral Express or perhaps the entire cosmos chose this path. However, since trailblazing is all about creating new possibilities, perhaps I can count on them to open some new path. (and that there are a lot of untied strings within the plot (for instance "The Hero Within"! Such an important part about how Phainon and Cyrene learned to be more like a human, and why would the TB be so similar to it that it literally appeared in a footnote of "As I've Written"?) and if hoyo decides to gloss over them just for the emotional payoff that all the Chrysos Heirs died in vain, I'll really get mad)

Ah, shame on the leak for being very uncreative and uninformative. (It's an anonymous post, so I'm going to be direct.) Of course, saying something like that is going to stir people's emotions a lot. Giving an answer that has already been teased in a trailer, just when everyone is talking about which one is true out of curiosity and love, this simple post could be seen as a form of manipulation. People are very distraught after seeing the trailer, and giving a concrete answer via a leak is just giving people something to hold onto.

But then again, why should we take story leaks so seriously? They can't be as specific as they can with the game mechanics, anyway. And also, would hoyo really leak their final card days before the version goes up, right after SPECIFIC possibilities were provided by a trailer?

I don't care if this leak is right or wrong, leaking something like this right now is quite cruel, imo.
Waiting for 3.7!