Season 7 kicked off on 11/2. They aired one episode each day from Monday (11/2) to Friday (11/6) to form some sort of mini arc with the King of Ooo, now the Princess of the Candy Kingdom, at the center of the story for the most part. All of a sudden Princess Bubblegum's first name is Bonnie? I wonder if this is a reference/joke on that fact that Princess Toadstool in the Mario Bros series is more commonly referred to as Peach now. I'm not a huge fan of the King of Ooo as a character, and I don't really care about him. I care more about others who weren't showcased. Overall, I'd give this arc a 2/5 stars.
There were no new episodes 11/9-11/13.
On 11/16, they changed the opening theme song to center on Marceline who is the focus of this arc. It's subtitled STAKES. Parts 1 & 2 aired on Monday, 3 & 4 aired on Tuesday, and 5 & 6 aired on Wednesday. The last two parts (7&8) aired last night, and I've yet to watch them. There is a hint of Kill Bill in this arc as Marceline hunts each of the five vampires on her "list" that once gave her her powers. With Marceline at the center of this arc, I was really hoping for more musical undertone, but it's been very minimal. I'm enjoying the structure of this arc better than the first, but some of the beats are falling flat and it's pretty predictable. Without seeing the conclusion, I'd give this arc a slight edge over the previous one. 2.5/5 stars.
New episodes after that? Good question. I'm not a fan of the sporadic schedule.