Hard to say, they're so hush-hush about the story it's really hard to even tell the direction it will go.
Even disregarding Versus, I'm still hoping for something sad and emotional and not just solely about road tripping with your friends.
I hope Luna becomes important and I hope Ardyn is just a red herring to the true villain.
I agree with Luna, she needs to show more..although i don't think she will be as important as we would like, i just want to see more scenes from her than we have been shown, doing more things in general. I get that its a primarily a 4 man show, but she's still apart of the story after all.
Also, can you tell me why you don't like Ardyn as the possible final villain? It feels like they are trying to build up the feeling that he's got a lot of charisma and unique personality to him that would fit perfect with a main villain after all.
The only two other people who i think could possibly be main villains are the old nifleheim dude with the armor, or Ravus, which i doubt, cause the guy seems like a jobber who got his arm burned off cause he was a dumbass
It was the Versus driver the whole time!
From the shadows he will appear after all of the villains have been slain and will utter a single phrase, directed at Noctis:
"Noctis orgy."