Fandoms are meant to be totally random, and are actually chosen in a "can I make use of it in my story?" sort of manner. Making a list of "fandoms that have not yet appeared but are there", so, is utterly meaningless as I would besically be limiting my own narrative options ahead of time. Same goes for the surviving PPC personnel - I'm not making a list ahead of time, especially sicne the PPC is not the focus of this story (I consider the PPC more like just one of the involved canons, not the "home canon" of this work.) But I can say that most of the other agents are, well, gone. Due to how it was set up, HQ was even more vulnerable to the Unravel than normal fiction space is.

The rest of the TWWA world is... well, not too different from the Contested Continent in which my main story is set. For the record, Huinesoron's spinoff is actually happening in a different continent, which ihelps justify why there has been no contact between his group of survivors and mine even months after the Unravel.

Other timelines got to interact, as clearly shown by the fact my main group of characters comes from at least three different ones. There's no reason why characters from, say, the World Without Sues (Uuuhm... the way you named this timeline feels oddly familiar) could've come in instead of the main ones, just like the characters from Muv-Luv have several in-universe timeline from which the can come (so far I've used only the ones from the The Day After one, though.)

As per TWWA spinoffs, I'm afraid the answer for the time being is no. I greenlit Huinesoron's out of friendship and mutual trust (and he brought me the story for scrutineering before publishing), but TWWA still remains my pet project. Greenlighting people to write for it will be the exception, not the rule.

We had three separare groups we were following, as well.

• Sergio's group, whose plotline involved understanding what is going on (until Chapter 3, when Corolla was found) and then loooking for other survivors and supplies.
• Nikki's group, whose plotline involved a bit of the same questions Sergio's had, but eventually the questions switched to "why is Spare Squadron even operating at all in this situation" and, oof course, how to survive being used as disposable pilots.
• Keiko and Hajime, confused by each other's existence just as much as by the Unravel, looking for their family.

Those three groups fully converged only during Chapter 8, which means that until then we had to follow the situation of more than one group of main characters. Also, in the first half I kept introducing new characters almost every chapter, which only increased the confusion!

I think things really improved around Chapter 12. Many plotlines were resolved - what happened is clear, Strike Dove has now an official status with the surviving countries, the main character groups are now just one. I also worked on the character amount, by basically "off-screening" the Razgriz and Hayate's ship, and making more clear that the new supporting characters were, in most cases, just temporary support.

Also, the main plot lines are now just two: "End the war" and "What is the Professor up to", with secondary character plots that are either being resolved (Nikki and Sergio's emotional problems), or not the main focus of this arc (Keiko's Cyber Formula shenanigans, which will have their own arc soon)

Oh man, the T.S. Eliot imagery . . . this is going to be a good series!

Gosh, my mental view of Jasmine is so colored by her appearance as a Cat during your histories . . . it's going to be weird picturing her as a preteen! I'm excited to see more, but at the same time, I'm dreading the reactions Constance and Jasmine will have when they realize what's happened . . . Also, whoever this crowd they can hear is, since it seems to have been gaining on them even before they turned around . . .

—doctorlit has a Plan of his own for this world, but no time right now to write it anyway . . .

In fact, I think he's the one who's fully to blame for my return here. Baiting me with cool ideas and fun collaborations.