Very exciting! I'm really hoping they take some focus of of Starlight Glimmer and back on the main six. I don't hate her or love her, she's just kinda there for me, but I don't like how much season 6 focused soely on her and felt it was a touch early for Twilight to have her own student. It doesn't feel like that long ago she became a princess. Plus, hey, I miss my bby Fluttershy. And Pinkie, and, of course, Dashie. (Or as I just thought to call her, the Dash-ster. XD)
Hopefully this season will include even more character development and some cool adventures. (And hopefully something else with Dashie being a Wonderbolt now, since the episode where she actually became one was terrible and the episodes that followed that storyline, in my opinion, weren't very exciting or super great.) Twilight is my least favorite, but I'd love an episode of her or her and the girls babysitting Flurryheart. It would be hilarious! I really hope the writers do this at some point in season 7, since, surprisingly, we did not get it at all last season.