In 4x12, when Killian was looking at the board with the missing fairy reports on it, there was a sticky note that said the owner of the lakeside mansion is named "Yen Sid" (the sorcerer in the movie Fantasia.) Backwards, that's "Disney" but most of us have already suspected this since we found out about the hat in 4x01.

BUT.

Rearranged, you can also spell "Sidney" is Sidney the sorcerer...?

Or could he be the author? Remember season 1 when he was the journalist for the Storybrooke Mirror? So we know that he is a writer...

Is he both?

Blue still seems shady to me...

BUT WHY WOULD THEY BRING HIM BACK OTHERWISE WE HANDN'T SEEN HIM SINCE SEASON 1 WHY DID THEY NEED HIM? HE DISAPPEARED AFTER 4x05 TOO, YOU GUYS WHAT IF?!?!?