It already did. 2003, for the GameCube. It's weird they called the first one Splatoon 2, but Nintendo is a mysterious company sometimes.

????????????? splatoon 2? i think you mean somewhere between 2017 and 2019, nintendo switch. 3 followed soon after, somewhere between 2020 and 2023.

it released in north korea for a test run but reviews were poor so doubt we will see a port for the NES or the N64..maybe game gear, sorry bro