Here's your UBW sequel

>Shirou went to London with Rin!
>While teaching Shirou magic, Rin learned back few projection magic tricks for herself too. Including own version of Rho Aias that has shape of five petaled sakura flower.
>Saber disappeared in 5th Grail War, but her spirit remained and now starting possesing body of Gray.
>Sakura became completely irelevant, probably staying in Fuyuki and breeding wormy babies with Shinji.
>Dismantling Grail War is Endgame!
>Rin and Shirou go to London together
>Rin loves Shirou and didnt give up yet which happens only in Fate or HF
>Luvia hints that Rin's presence makes it hard for her to steal Shirou and specifically says she wants to steal him from her which doesnt make sense if they arent a thing
>Sakura is NEVER mentioned
>Shirou can make swords as if it's nothing and Rin event drops a casual line about him replicating the Azoth sword which would be possible only in UBW since in Fate or HF he couldnt have gotten so good so fast
>She starts doing "SEIGI NO MIKATA" adventures which only happens if Archer story moves her which doesnt happen in Fate or HF
>Waver recalls the scene at the end of UBW anime (written by Nasu) which is the most obvious proof