The Servant/Master List is here:
Tohsaka Tokiomi – Togame w/ Shichika as NP (Katanagatari, Saber)
Kotomine Kirei – Rei (Evangelion, Lancer)
Emiya Kiritsugu – C.C. as Zero (Code Geass, Assassin)
Uryuu Ryuunosuke – Esdese (Akame ga Kill, Caster)
Kayneth El-Melloi – Mami (Madoka Magica, Archer)
Waver Velvet – Simon (Gurren Lagann, Rider)
For fun, I also made an image illustrating the pairings. Image link.
I know I'm not the greatest writer, but I think the stuff I have planned are pretty cool. I chose the Servant and Master parings based on dynamics, and they all will be pretty interesting. Due to the fact that most of the Masters summoned a different class, the events of the war are quickly going to diverge from the original, so that will be interesting as well. I intend to write it so that even if you haven't read all of the series involved, you still should be able to understand every character's motivations/personalities/etc.
Of course, this means there will be major spoilers for almost every series involved (some less than others), so be warned.