Tsukune vs Akua is coming up. That much is pretty obvious.
To be honest: the outcome of such a fight at this point is pretty much clear, especially considering the lengths gone to in order to showcase much much Tsukune has matured, he's much stronger than before, etcetc. In all likelihood Akua will be raging, seems to have the upper hand, Tsukune seems down and is all like 'crap I'm still no match for her!' then Moka does her teary eyed thing and it's all 'power of love, power of friendship!' from there. I can not see it going any other way, the plot essentially
demands her defeat (especially considering the whole Alucard is awake/Gyokuro is on the move etc plot threads).
What happens afterwards though is what I'm interested in.