Posted on the official Ika Musume Twitter account about 11 hours ago:
Tomorrow, there’ll be a huge surprise coming geso…..(happy) #ikamusume #geso
It says about 11 hours ago, so safe to say it was posted on December 1st~2nd JST. The tweet has been removed now – so that adds to the suspense of the “big surprise” to come tomorrow.
Some are speculating an announcement of a Nendoroid Ika Musume, while others say an announcement of the 2nd Season.
We shall wait and see what happens tomorrow.