User blog comment:B214/Season 3 confirmed!!!!!!/@comment-1359322-20141212134202/@comment-1359322-20141213101921

Cour = 12-13 episodes.

And you do realize that neither Koneko, Akeno, Asia, Irina, Sona and Tsubaki were involved in the Khaos Brigade assault right? That's what i meant by inserting Rias + others.

And i doubt they would do a Season 4 immediately. At the end, all that matters to TNK is profit. No profit = no new series. They'll still see how Season 3 sales will turn out first. Not every studio will take a huge move like the one IMS took, if DAL's sales was bad, they'd be losing money with a second season.