I do think it will be Mando.

I have no clue what will happen next season of Mando. I think it does depend on what happens in Ahsoka and when that comes out.

If Ahsoka comes out before Mandolorian S3, I think it does set up a bigger arc.

So like here i think you could be correct, we could be getting a Cad Bane cameo. You're not wrong on speculation I think.

But let's go with Ahsoka coming out before Mando.

So Cad Bane after being defeated spills the beans that he wasn't hired by the Pykes but by someone else. And that ties to Ahsoka who will be hunting Thrawn. Thrawn winds up being a bigger threat than she alone can handle and winds up coming after Mandalore in an attempt to re-conquer it as the Empire. Which ties to season 3 of the Mandolorian where they all team up to over throw Thrawn then deal with the aftermath.

But who knows.