While we have no official word on his status, Varis was only able to seize the throne by defeating Titus in a civil war, he wasn't mentioned at all during the civil war Zenos kickstarted, and he would have had more than ample time by now to lay claim to the throne if he so chose; all of the other Garlean royals are in the same boat for the second and third points.

It's not outside the realm of possibility, but make of that what you will.