For them to introduce a Job mid expansion would be weird, off-key, and probably really bad if they locked it through the story. So it certainly wouldn't be the best idea.
Either of those jobs, as well as any that exist in the game could come from anywhere depending on where you spun the narrative. Lore is what ties it all together.
Thing is we could get anything from Ala Mhigo if it's designed that way. But SAM is and has been of Doman origin, and while entirely possible the RDM could be, the aesthetic questions that possibility.
You have me questioning this now since I swore I saw it somewhere, so I'll be digging around. If i can't find it I'll feel embarrassed, but it makes things simpler. Peoples have kept passing the word that there would only be two jobs, the argument is that if he has said that he didn't say it this time.But never saying it at all means any number is possible, just he can't guarantee anything beyond what he planned with shirts.
Exactly that though, that claim was just for example. She can be anything, which leaves everything open. Thus far, everyone has kept to DNC or BLU because to their reasoning those would be the best possible choices, or the ones that make the most sense. But we can get anything for all we know. That's what I'm interested in, Ala Mhigan culture is neat stuff, so anything more that develops the lore for there I'm totally for.