What? no, the 5th grail war did happen in this timeline, we just dont know what route (it doesnt really matters anyway).
The only timeline that gets the grail stolen is the apocrypha one.
The system used here is a copy they got from Faldeus ancestor that was a master in the 3rd grail war (and is...
All the castle was under the fog so to escape she needed to get out of the castle first i think.
Waver is talking about the catalyst actually summoning iskandar again or just any other related hero. Some catalyst can summon more than one hero so he probably was scared of not summoning iskandar...
The condition is answering the summon they dont really need a wish, is just that if you dont have a wish for the grail you wouldnt want to be summoned normally. Being summoned is enough for rider of red wish, he just wants more opportunities for being a hero so it works (same way that Lancer...
They have their own canon set around the event were they escape and steal scp-2117
http://www.scpwiki.com/stealingsolidarityhub
Imo the story were the foundation recovers the ship and the company becomes a task force is really fun.