User blog comment:Jojo-a-gogo/ Remaining ASB characters annoucements (RUMORED)/@comment-9445813-20130512053121

Not a lot of characters in IV that would make sense. Sucks since it's my favorite part. Josuke, Rohan, Okuyasu, Koichi, and Kira pretty much covers the story in terms of original characters. Akira Otoishi would of been awesome though

Vento Aureo isn't my favorite but it has a load of great characters and great stands so I understand why they put so many of those characters in the game.

Pretty solid list. I hope this is true.