New hair styles, new game modes, new stages, new music, 140 pieces of new gear.
New stages include a museum and a supermarket as well as a new Salmon run stage.
Two “new bands”: Bottom Feeders and Ink Theory.
You can now swap gear without leaving a match (!!!)
— Nintendo of America (@NintendoAmerica) November 21, 2017
New level cap is lvl99
New mode – Clam Blitz:
In Clam Blitz, competing Inklings are tasked with collecting clams scattered around the stage. After one is picked up, the clam weirdly follows you. Your objective is to throw the clam into the basket near your opponent’s base. The first team to score 100 points wins!
Full details here