Famitsu put up a new post about the game (which Perfectly Nintendo translated), and also Sega opened up the official website for the game.
It mostly just shows screenshots that were in a poster for the local tests mentioned before, and most importantly that the Arcade Edition actually has a release period set for Spring 2016 in Japan. Could we see the Wii U and 3DS versions at the same time? Only time will tell. As a note, Sega are developing and publishing the Arcade Edition, but Nintendo is publishing the Wii U and 3DS versions worldwide.
Screenshots are below as well as another look at the arcade machines: