My money's on a whole new Belmont much like Gabriel was. Let's hope that "Iga vetoed the use of Julius" rumor is true.
People keep saying this as if he could do that. Unless he was in a high enough position, (like Inafune was at Capcom) he can't really "veto" the use of Konami's IP. He doesn't own the character. Konami does. (And even then, Inafune couldn't either, most he could do was push for games and such, or veto bad game concepts)
That said, I'm torn. on the one hand, I'd love to see another original Belmont, (and it would work out, starting the series with an original Belmont, and ending it with one) but at the same time, I'd love to see a re-imagined Julius, after Simon and Trevor.