The title page for chapter 178 of Minami-ke from this week's Young Magazine had an announcement... of an announcement. The announcement at the top of the page reads: "Big Project in progress!! I think it can be announced this Fall!" with a probably related: "A new project has begun. This isn't about something minor like what's with the first press limited edition of volume 9 of the manga!"
The 2ch reaction to this is probably not quite what many would expect:
576: "A 2nd season is coming?"
581: Re: 576
"There was already a second season right
592: Re: 576
"There was already a second season!
Looking forward to the third season!"
609: Re: 592
"Strictly speaking this is the 4th season.
How the fans think of this is another matter."
If this were a new season, it would indeed actually be the 4th season and although it mentions it isn't related to the manga, it would be the second OAD/OAV if it were that. Remember, the not-so-usual suspects are also possible: Live action drama, movie, spin-off mangas etc. Expectations anyone?
Image ©Coharu Sakuraba, Kodansha