Japanese ads for HSR may already have delivered some hints at which characters from Fate UBW could play a part in the crossover. To no one’s surprise Saber aka. Artoria is among them.
Why settle for stories with ancient heroes when mages can summon these warriors to fight on their behalf? Type-Moon's Fate franchise combines noble warriors, historic figures, and mythological beings.
So part of their philosophy in achieving the shot in Born Again involved a cinematic philosophy that they call the “train tracks of fate.” Watch one minute of the fight scene in the clip below ...