Many interesting things here.
For starters, I thought Junpei and Akane never ran into each other again until the events of Zero Escape 2? They are both part of the same team here, so there's no doubt that they will see each other in the game.

Maybe putting the timeline part in a spoiler tags is best in case someone hasn't played the first two games.
Anyway, that's probably it. But a strange change to make since the rules say that everyone except for three have to die. So I don't see why you'd want to include more than three characters who were essential to the ZE2 events.
We already know of one person who survives here. But I assumed the two unknown people would be the obvious ones, before we now found out that there are more people here who will be alive during the events of ZE2.
Then again, just by having Junpei here would alter the events of ZE2, unless they perhaps wipe his memories afterwards, or something.

I meant to say "having Akane there, and meeting Junpei", and I was thinking that it would create a paradox. If the events of ZE2 don't happen, then the people in ZE3 wouldn't have the same knowledge/motivation to stop it from happening.
Then again, this story includes paradoxes. Like how Akane can even exist after the first Nonary game. I almost forgot that for a moment.

But I still wonder, or hope, that they will explain how supposedly only three people survived, but from what we know, at least 5 of them did.

Y in Free the Soul of Y stands for "left eye of Horus" according to Uchikoshi, whatever that means besides of course Left is the name of Brother's brother (lol).

Interesting. I wonder if the deaths have to be within the team that found the password? If so that means one from each team will make it out alive, and that one entire team making it out alive is impossible.