I think the mandos will be hanging around for next season too.
In fact, it looks like there will be a number of characters introduced in past story arcs returning in some form or another. This week's commentary showcased the sound design by Matt Wood and Dave Acord. In one of the scenes Acord was mixing sound to some footage that appeared to have Hondo Ohnaka (pirate leader in "Dooku Captured) mixing it up with Anakin. I don't remember a scene from last season that looked like that. Plus, based on the vegetation around it kind of looked like Felucia.
Of course, I could just be seeing things.
What I'm wondering is whether these future episodes follow some sort of sequential timeline, or will the story arcs jump around to different times in the clone wars? (Like they seemed to do with this past mando trilogy, and as Filoni has apparently stated in the past.)