Ok, here we go....
This week is known.
23 Nov --> 29 Nov: Nier (Raid Week 1) + Fan Festa Week 2 (Wave Week 2)
The following week is crucial to what happens in December. Historically, collabs get 2 weeks of dedicated time. But, in the 7* Era, that appears to have been thrown out the window. That opens up a lot of options. The 64 million gil question is whether or not Nier gets the 14 day collab treatment again. It's **possible** given how big the collab is. However, that's a lot of valuable time real estate in December that Gumi wouldn't really want to give up.
Double confounding the issue is that Nier is a raid event, so another raid can't show up. Further, we will be exiting a story event, so that can't happen either. So, the only possibility is a Mog King event, if the week is not taken off. I can't see that realistically happening in December, so....
30 Nov --> 6 Dec: FF7 Tifa/Vincent (Mog King Week 1) + Nier (Raid Week 2) + Main Story (2-5-2)
Main story event goes here as the attraction to burn this month's story lapis allotment will be compelling to most.
The following week is super easy to call. So... what Squeenix game has a collab in FFBE that has units that were promised a 7* that has yet to occur and it just so happens that this franchise's console game launches that week for the Holidays?
Yup, Just Cause 4 launches this week, and oh so conveniently, the raid schedule clears right up for a rerun of the chopper raid event.
7 Dec --> 13 Dec: Just Cause (Raid Week 1) + FF7 Tifa/Vincent (Mog King Week 2) + Weapon Enhancement Event
Weapon enhancement events tend to run on the second weeks of Mog King events, so this is as good a place as any to slot this in.
So, after all Nier and FF7 and Just Cause 4, there is a brief one-week window to squeeze in the next story unit that most have been saving for, Sieghard.
14 Dec --> 20 Dec: CG Sieghard (Story Event Week 1) + Just Cause (Raid Week 2)
And of course, here come the Christmas units.
21 Dec --> 27 Dec: Xmas Event (Wave/MK Week 1) + CG Sieghard (Story Event Week 2)
And finally, to just put a nice shining star on all of this madness, Gumi will repeat exactly what they did with the Halloween collab this year when in the following week, they ran VP. They will immediately follow-up the Christmas units with another top-tier collab for all those sweet, sweet, Christmas funds to be spent on nostalgia and OP units. Also, there is precedence for this as a collab immediately following the Christmas event happened last year (lol Ray Jack, but still.... has it really been a year since then? Wow, time flies).
28 Dec --> 3 Jan: Xenogears (Raid Week 1) + Xmas Event (Wave/MK Week 2) + Main Story (2-6-1)
There isn't enough lapis on this planet for all of these banners. RIP to everyone.