Pokeani says something about Ayako's rival appearing in the contest episode. Her name is Yuri, and I think she hasn't seen her in 20 years, but I'm not sure.
They also say that Mars and Bunyat will appear in the Ginga-Dan episodes. I'm guessing that means Jupiter and Skutank will get their own episode later.
Well, that confirms it, then. Hopefully this Yuri at least brings a new Pokémon that isn't Glameow or Purugly... I'm sick of that line in Contests.
Zoey did not need to appear in Solaceon Town. Everything she told Dawn could have been done by Johanna or Kenny instead, or Dawn could have figured it out on her own. Zoey also did not need to appear in the trade episode, which ironically enough had a Kenny cameo.
Nando was also ignored completely during the Wallace Cup when even Soledad appeared.
At least we finally get to see Mars. I'm not counting out Cyrus or even Pluto as possibilities yet though.