They should add Lancer,Beserker,Archer,Shirou and maybe Rin from F/SN
and they should add Sion Etlam Altasia and Arcueid Brunestud from Melty Blood
(Tsukikhime 2d fighting game)
Offtopic:
By the way Tohno Shiki in FOC is actually Nanaya Shiki.
First of all the picture, then the techniques.