Since several questions will be revealed later on that are left from our digging :
horns
corguievas
nielle's future
the assassin
warburton
the information
travanchet's goal
one of the few remaining questions would be about Fye.
i have several questions about the "new beginning" intro but i'm sure those can't be answered here and now..
On a less critical curiosity in the 1.0 intro when the Elezen says "Oh look who's back from his reverie" is another way of saying "Hey look who just came back from an Echo" since as Ferny stated all 3 of them possess it?