[quote=@The Silver Paladin]
Then Fate/Zero takes place in a different universe as well where the Grail was stolen and corrupted. Maybe the reason it's not mentioned, is because it's unknown that it's happening! Ever think of that?
[/quote]

Sorry dude, the five Fuyuki Grail Wars are the only 'canon' ones. All the others are part of alternate universes with differing points of divergence and have very different mechanics. Main canon also says that there can't be any more Fuyuki Grail Wars after the Fifth, but I assume JohnWolff has an explanation for that (and even if not it's not difficult to work around).

Also, looked over the details; definitely interested and willing to offer advice and practical knowledge if I do join, just need to check my schedule and have a rummage through my notes for stuff. Got a few Servant ideas already, though.