IMO, God!Father will be on the spine of Volume 26, and Trisha will be on the spine of Volume 27. It just sorta makes sense.
Though I would be happier if Lust got 26 and Hughes got 27, since they were neglected to get a cover while Father got 2, Al got 2, Ling (sort of) got 2, and Greed got 2.
Yeah, I seriously think "God" Father will be on 26. You make a good point about Trisha on 27, although Arakawa did say that all the characters she put so far were in the final arc (Vol.21-Vol.27). It could also be normal Al with short hair to signify his return to normalcy and the end of Ed's personal goal to bring Al back more than anything else.
Is 26 the final volume?
If theres a volume 27, which chapters will be included??
There will be 27 volumes. Right now the amount of chapters in each isn't confirmed, but it's most likely that chapters 104-106 will be in 26, and 107-108 will be in 27.
Vol. 26 HQ
Father looks so sad though!
Anyway, I'm betting on Trisha for the last spine. Or grown-up Ed. Al already got two spines, so I doubt it'll be him.
What chapters? 107-108-108.5?
The gaiden is also included. It's not going to be out until November 22nd.
Vol 27 in HQ