Well, in my opinion, Akasha's return wouldn't be a good idea at the moment.
The reason, being the fact that in the flashback to Moka's past, Akasha herself said that she dosen't think she will be capable of getting out of Alucard on her own.
In other words, I think the matter of Akasha's return needs some development, and it wouldn't be a wise idea to pull it out of nowhere, like what occurred with Issa's appearance on the scene.
As for the topic of another separation into Season III, I see no point in Ikeda doing that - after all, the first separation occurred. because R+V changed the magazine in which it was being released, and so far I have seen nothing indicating that the same thing might happen again.
Furthermore a separation into "Season III" might mean that we will be forced to wait for a longer period of time, then a single month, between the last chapter of the "Second Season" and the "Third Season" of this manga, and I honestly doubt anyone of you, would want something like that to happen.
