Now that the Nintendo Labo cat is out of the bag, various videos have been making the rounds, but this one stands out the most out of all the ones I've seen so far.
Evidently back in October of last year, a Twitter user by the name of masaki_samurai showed off a creation for his kid -- a custom Splatoon 2 gun that works with the Switch's motion controls/Joy-Con. It's a short one, but it shows the general make of the gun accessory, how the Joy-Con slots in, and how it works in action.
If Nintendo didn't already have the idea to create gun accessories for non-violent games like Splatoon, they do now.
Masaki [Twitter] Thanks Jeff!
via destructoid https://www.destructoid.com/one-kid-already-had-the-nintendo-labo-concept-down-pat-last-year-483875.phtml