I don't think that type of story would really work without it being a comedy or gag.
Place your hope in Grand Order.
Something
Maybe something like the True Ancestors trying to use the Grail for something, the cast of Tsukihime team up with the current Servants and Masters of the 5th Holy Grail War, and stuff happens. As chessy as it sounds, it'd be pretty awesome.
When Arc finally gets added in the Fate/Moon Princess Order collab event and establishes herself as the top dog on the powerlevel charts you'll all finally realize that Dartz was right all along
Well she has 4 usable skills than the usual 3.
That's gamebreaking.
Something
one of them is a passive skill i imagine
QuotesA Writer's FateF/GO JP (Updated: 4/11/2019)
Ultimate One EX passive automatically adjusts her attack to be one point above the enemy she's facing, so she has trouble farming skeletons in Fuyuki.
Inb4 Arcueid is introduced in F/GO as a Beast that you need to defeat.
"Here's a bangin lil' tune about takin' on The Man!"
(Check out my Super Special Awesome Servant Compendium here)
You know I just realized but other than Shirou, Raiga, and Taiga, who else knows about the funds Kiritsugu set up for Shirou?
Well you already read, apparently Gudao resembles Tohno.
QuotesA Writer's FateF/GO JP (Updated: 4/11/2019)
Spoiler: Chaldea's Shiki is not the Shiki she's looking for.
Something