Won't Touhou Project will eventually become mainstream(widely popular trend) while still being a doujin? i think it's not something that's really avoidable.
If you mean ZUN selling Touhou rights to some official commercial studio, then thats scares me i can even murder ZUN himself i think, i dont know, i guess i would probably :derp: or better, execute him before he does that
Too much official "too extra fan service" wont be good for my sage-mode-purpose-of-life i think. fanwork bad enough, if "those" behaviour ever become official, screw world, i join ISIS.
Komachi might not actually that big, i could love her more if not for that "big" that fan associate her with in most fanwork. But fanworld standard proportion may vary per dimension according to their GOD so a big Komachi is fine too once in a while. :derp:
About censorship, i think the religion and legend arent much of a concern because it can be easily a derivative fiction work. What would get censored in my country is Reimu armpits :derp: 50% joke btw.
The sake and party with sake would most likely get omitted, would be hilarious to my amusement if they still show that while censoring the whole scene, but depends on how perception will change. Im not sure about mamizou pipe, but i think it's fine. The god/goddess thing can be debatable, not if they shrug it off as deities instead as "higher being" not like its that much difference lol. Higan can be controversial i guess, idk.
The youkai eating human isnt problem as long as they didnt visually depict the guro life scene, dunno about Mokou suicide moves.
Anyway i probably just thinking too much, they would just come out as cartoon & game if its ever get into public media.
Regarding modesty of attire is what i quite proud of from Touhou, canon Touhou rather safe for wider age range compared to their canon "neighbour" which has literal canon. :derp: (dem thong & bandage bra)
I think going mainstream as in more popular while ZUN still in the ultimate total control, stay doujin that is, can be good and bad just like how thing has been happening all this time. We could get more sillyness from fans, or get another awesome work like "osana reimu" for example. I like how they design Lord Tenma for MUGEN :derp: just as otherworldly as Hecatia the trendy girl of death metal hell (lol).
But will be good if that trend outburst would quickly died off so nothing too annoying would come out of it, and we still could get another good fan staying behind. Not occult believer, but fan.
Basically my answer is, get mainstream just for a bit moment but still a doujin. But i thought Touhou already mainstream enough?
If some of touhou element are considered heretic to your society then just become a secret fan :derp: like me
join me lets plague people mind with nothing but touhou, slowly from the dark (please ignore this last statement)