Celestia: “I really want some time off, but with ponies already gearing up for the election next year, I need to be here. Though Twilight and Cadance have witnessed several and have been taught about them, they’ve never ruled during one. And for Luna, elections are completely new to her. So I’m stuck here for the next year and a half… Then longer to help get the new Prime Minister settled.”
Here we have the Changeling revealed from the last comic update, followed by some Blueblood. Blueblood won’t be a prince in the comic, but his presence will be relevant. Expect to see these other two ladies fairly soon. they have larger roles to play in the story.