Being a fan of the Persona series since the first game came out in 1997, I feel like we've gone for too long without seeing these two important characters. While we have been seeing the little glowing butterflies that represent Philemon, I'd like to see him in a speaking role again. The same thing could be said for Nyarlathotep, who used shadow versions of people for his own ends but hasn't shown up himself since Eternal Punishment. Nyarlathotep could come back as the persona of a new villain, as he was once the persona of Takahisa Kandori in the first game. I suppose with other deities as antagonists it's unlikely we'll see Nyarlathotep in the near future, but I would love to see the Crawling Chaos come back to taunt and threaten whoever the new persona team will be.
What about you? Would you like to see Philemon and/or Nyarlathotep return in Persona 5? Maybe not in a major role, but perhaps a cameo of sorts, or get more hints aside from the shadows and the butterflies showing that they are still around and influencing the world.