Looks like ranked matches, a new map, and a new weapon will all be added today at 7 PM PT. Pretty sick!!! The mode is Splat Zones, the new weapon is based off of the NES Zapper, and the new map is called Port Mackerel.
http://m.ign.com/articles/2015/06/01/splatoon-gets-new-mode-map-and-nes-zapper
I bet the Wii U would sell more than 15M LTD by the end of 2015. He bet it would sell less. I lost.