It doesn't seem right to have Gappy in this game yet - Jojolion hasn't been published long enough for him to do a whole lot with his Stand yet. I also don't like his colour scheme, a gold sailor suit just seems so wrong to me.
I can see Kira in that scan too, but I can't tell if it's announcing him for the game, or if it's for something else Jojo-related.
EDIT: I just found
this, looks like Kira is a DLC character.