At this evening's Nintendo Direct, Nintendo announced that a paid expansion would be coming for Splatoon 2 later this year. The expansion will tell the story of Agent 8, an Octoling with amnesia who awakens to find herself in a series of 80 test facilities connected by a subway. After beating the single-player portion of the expansion, players can also play as an Octoling in the game's multiplayer mode! The Octo Expansion releases this summer for $19.99, and you can receive exclusive Octo gear by pre-purchasing starting today!
Source: Nintendo Direct