This could be a placeholder release date for the game. (cogconnected.com)
This time, with Splatoon 2 currently holding a summer 2017 placeholder release date, the game's Global Testfire demo will be held considerably early, March 24 - 26, assuming that Splatoon 2 will still be releasing this summer. (nintendocastle.com)
Although no news about the release date is confirmed by SEGA, Amazon seem pretty determined for this release, although it could be a placeholder release date. (soahcity.com)