Alright, so I just saw the Season 4 preview. Here's a link to the video. So far its looks promising. I saw a Scootaloo episode revolving around her inability to fly, a song sequence with the Apple family and Pinkie Pie, a strange super hero episode (I smell Merriwether's work), and a preview of an episode where Princess Tool actually sees how Luna became Nightmare Moon. So yeah looks promising.
Check it out, and tell me what you think of it.