One of the original Splatoon maps and one of its weapons are heading to Splatoon 2. The Japanese Twitter account has revealed the return of Walleye Warehouse and Slosher Deco. They will both appear in the game tonight in the Americas and in Europe and Japan on December 15, 2017.
Walleye Warehouse was a launch map in Splatoon. It has an open area in the center, multiple side paths, and areas that allow you to get on top of boxes and crates so you can splat people below you.
The Slosher Deco was one of the weapons added to Splatoon after launch. This version of it comes with the Baller special and Sprinkler sub weapon.
Splatoon 2 is available for the Nintendo Switch.