Currently Online 
Oh God, I see my Twitter and everyone is now expecting Fable because of a silly, fun little Twitter ad, haha. Xbox better come out and clarify it isn't a tease for Fable. It barely crossed my mind, I mean, sure, it sounds a little like a Fable tune but so do a lot of things, I hear Fable in The Great British Bake-Off 
It's a generic pizzicato string instrumental, the tune isn't even from Fable and Harry Potter uses similar strings. It's an extremely common tune used for "mysterious" vibes, Lol. In fact, I'd say that it sounds more Grant Kirkhope/Banjo/Rare than it does Fable, if you were to put them side by side it sounds closer to Banjo than Fable.
It's just a generic whimsical fantasy tune used for everything whimsical or mysterious, Lol.
It 100% sounds more Banjo than Fable but I ain't saying it's a tease for Banjo 
Just as an example, this could fit straight into Fable too, Lol.
