User blog comment:Inept Wiki User/Cosmos in the Lostbelt: Post-Prologue, Pre-Anastasia Information & Speculation/@comment-31552453-20180315142953

I was reading the "recent" GO story thread of Beast's Lair. They mentioned that the Lostbelt Servants will possibly be alternative versions to the normal history Servants and stronger than them. There were also mentions of the unnamed Rider's possible identity, which mostly included Greek Servants (Ajax, Aeneas, Peleus), Spanish Servants (El Cid, Hernan Cortes) or others (Ogier, Urashima Tarou). You can go read all this yourself and add as you like.