I'm thinking, what series already in Smash haven't had a game since Smash 3DS's launch
Mario has Odessy lined up and has had Kart 8 Deluxe and that sports game
Zelda had Breath of the Wild
Pokemon had Sun & Moon
Donkey Kong hasn't had anything big
Metroid got Federation Force...
Star Fox got it's first big release in years...
Kirby got Planet Robobot
F-Zero & Earthbound got squat and have been that way for a while.
Fire Emblem got Fates and has Echos, Warriors and Switch lined up
Dr Mario got Miracle Cure
Kid Icarus hasn't gotten anything besides contempt over how much of it is in Smash
Wario has had nothing... Ware or Land
Pikmin is gettin HEY, Pikmin!
Animal Crossing got an update to New Leaf
Punch Out hasn't gotten anything but ARMS looks like it has it's spirit
Wii Fit has had nothing, nor do I expect it to return.
Xenoblade had Chronicles X and is getting 2.
Long story short, only two series that are overdue but not dead are Wario and Donkey Kong.