We know that Splatoon 2 will be continuously updated with new content for quite some time, just like the original was on the Wii U. What we don’t know is what new content Nintendo plans to provide. A dataminer on Reddit has discovered some possible new modes which could be added to the game as well a new weapons and much more. If you don’t want to be spoiled avoid the video below!
Rumour: Dataminer Discovers More Content Possibly Coming To Splatoon 2

Splatoon game receiving more content? Shocker.
Exactly what I was thinking.