[Gary29]

Yasaka is going to stay single, since she gave her daughter to Ise.

By the way, further information from Ishibumi's blog. This is about the anime:

Apparently the staff at TNK were really hyped to work on the fight scene between Ise and Sairaorg for the PV. It's also stated to be only for the PV, so it most likely won't be a part of the Opening video.
Something about the development of Ise and Rias' relationship in the LN being less during this point, so they decided to add some stuff (this makes perfect sense with the idea of bringing up the volume 10 developments moreso and earlier). Looks like the serious atmosphere between Ise and Rias isn't just for show.
I think he mentioned that they would love to do a season 4 and 5 if the sales keep up and that he wants to see the battle against the Hero-Faction and the Rating Game against Sairaorg animated.

It's definitely a good sign if I read this right and they're this confident in the series. The sales most likely won't disappoint either, since the build-up to what season 3 will begin got 9-10k sales per BD volume.