Neoalfa of Path of the King and Promises of a Wandering Hero fame has started a new crossover fic.
A... Fate/stay night x Sekirei one.
He doesn't even deny that it's inspired or influenced by In Flight. He does say, however, that in this fic Shirou is not Minato, and that it's a post-Fate route!Shirou. A post-Fate route that is twelve years after the fifth Holy Grail war, two years after the start of a conflict to prevent the Holy Grail War from recurring, and has resulted in the deaths of Saber, Rin, Sakura, Ilya, and Taiga, apparently.
https://www.fanfiction.net/s/11272829/1/On-Wings-of-Steel
In case you want to check it out. He says the next story he'll update is Path of the King.