@Katch K. in my opinion that's the best set up for any series: an overarching story with some one-off stories so it can either work on the world, work on the characters, or just have a bit of fun. Or heck, maybe even all three x3
I want a spin-off series of "Lars of the Stars" which focuses on the adventures of Lars and the Off-colors, We can learn more about their backstories and their powers. We can also have Emerald as a major (of not the main) villain.