Nintendo Direct hasn't happened yet, but it looks like a relatively small reveal may have tumbled out courtesy of the Splatoon Splatnet website. We suspect the automated process of the site's schedule page has caught Nintendo out as it shows an all-new stage that's on the way very soon.
It's called Museum d'Alfonsino and is scheduled to go live in both Regular and Ranked battle at 6pm Pacific / 9pm Eastern (12th November) / 2am UK / 3am CET (13th November) for four hours. You can see the screencap below.
It's always nice to have new things, so are you looking forward to trying out this new map?