She just mentioned on twitter today that she will be having multiple releases a month now. (Who knows for how long.)
Now, 2 weeks ago(maybe 3) WAAP was recruiting guys who can ejaculate a lot for one of their well known series that will feature Hana Haruna.(They always let you know who its going to star) Of course only Japanese can apply.
(The code for the series is WDI)
The filming will begin in september. So we won't see it until December. February at the latest.
So, these multiple release won't just come from DMM owned studios.
Hana Haruna's releases will sort of resemble the way Shiina Sora has been doing things.(An example.)
Also, Hana has been putting effort into her twitter account as of late.
So, Hana retiring doesn't feel like its happening anytime soon.
I wouldn't be surprised if she actually goes the route of 10 years or even more.