User blog comment:B214/Season 3 confirmed!!!!!!/@comment-220.255.1.127-20141219063949/@comment-104.14.108.166-20141220092318

It will be interesting to see, if we ever have the events leading up to and including those in volume 10 animated, how they decide to go about postponing Issei's confession to Rias, etc., considering he calls her by her name from the beginning of the anime which, in the novel, turns out to be a source of conflict/misunderstanding between them. Maybe by focusing on their relationship more in season 3 they will try to introduce some other reason for their ongoing tension so that the story later on makes a little more sense. They are probably considering, given the popularity of the franchise so far, the possibility/likelihood of future seasons and that planning ahead now (resolving lingering LN/anime discrepancies) is in their best interest.