UPDATE: This is now confirmed. Proper update to follow.
The Fate series is big enough to get western ports, with Ghostlight bringing Fate/Extra over here. Keeping the flames of fate burning in Japan is Kadokawa Games who are planning to bring Fate/Stay Night back to the Vita, possibly from the PS2 edition,
according to reports.
Here's the PS2' versions trailer, with euro trance soundtrack, which was developed by Type Moon and follows the visual novel theme with heavy doses of characterization and plot exposition.