Kalos is interesting as it doesn't have many obvious options like Unova did. For popular/important characters you have Serena, Calem, Sycamore, Diantha, Lysandre, and AZ with the rivals still missing while with the Pokemon it's just Volcanion and Hoopa UB for legendaries and Greninja, Goodra, and Noivern for popular Pokemon. With her VA saying Shauna is coming I think they'll pull a Hugh or Looker with her and have her as a Spotlight while Serena, Calem, Sycamore, Diantha and maybe Lysandre are the Pokefairs/Master Fairs.
In terms of who gets what, Greninja is popular enough that it'd carry anyone who has it so either Serena or Calem could get it and I personally would give the nod to Calem. Volcanion isn't popular, but the right gimmick could still make it sellable with the right character so either Sycamore or Lysandre could get it. Goodra would probably go to Diantha as I don't think they'd put a popular Pokemon with Shauna and they'll instead give her Chesnaught. Serena could get something like Noivern, or a second Sylveon if they're willing to double up for her. Finally, if AZ appears he has to get his Eternal Florette as it is hugely connected to him as a character.
Hoopa Unbound is an odd case since they dropped the hint about the form with Paulo's recent interlude, but since it's been connected to Lear's I get the feeling it's going to be something we see towards the end of the VA as a whole rather than given out for Kalos. So if I'm right on that then it'll remain in their pocket until later next year.