Splatoon 2 players will be given bonuses when transferring save data to Splatoon 3.
Nintendo’s Splatoon 3 Direct earlier this week detailed what’s new in the game, but a note on the official website states that save data can be transferred and players will receive in-game rewards for doing so.
Apparently “five out of five Squid Research Lab scientists recommend transferring data from Splatoon 2 if you have it”. So that’s that.