[quote=@TwilightDragon]
Traditional. I've only watched Unlimited Blade Works and some of Fate/Zero. ^^
[/quote]

Fair enough.

As for side plot, perhaps something that seems less important than the Grail War initially but will gain increasing significance as the story progresses. As for specifics...

*Ponders for a moment*

...with the advent of the new grail war there have been instances of Servant-like aberrations appearing seemingly at random without Masters?