Chapter 308 and who will be next?

Chapter 308 really surprised me! Akira Amano seems to gave some hint regarding the mystery of the story in this chapter. I like when Giotto and Cozart first met was shown (Normal Giotto still look the same with his HDW mode and I really love when he talk normally like a normal people with Cozart and even laughed ^_^), though it's unfortunate it's very short flashback...Ryohei and Koyo out from the battle, how will Tsuna get Ryohei out from Vendice? Who will fight next after Ryohei vs Koyo battle?