Currently Online 
I could be wrong, but this would be Nintendo's retail software output for 2013, 2014, 2015 (3DS & Wii U combined, excluded are third party games that Nintendo happened to act as publisher for in various regions):
2013:
Game & Wario
Lego City Undercover
Mario & Sonic at the Sochi 2014 Olympic Winter Games
New Super Luigi U
Pikmin 3
Super Mario 3D World
The Wonderful 101
The Legend of Zelda: The Wind Waker HD
Wii Party U
Fire Emblem: Awakening
Brain Age: Concentration Training
Luigi's Mansion: Dark Moon
Pokémon Mystery Dungeon: Gates to Infinity
Lego City Undercover: The Chase Begins
Donkey Kong Country Returns 3D
Animal Crossing: New Leaf
Mario & Luigi: Dream Team
Pokémon X and Y
Nintendo 3DS Guide: Louvre
The Legend of Zelda: A Link Between Worlds
Mario Party: Island Tour
= 22 game titles
2014
Yoshi's New Island
Kirby: Triple Deluxe
Mario Golf: World Tour
Tomodachi Life
Wagamama Fashion: Girls Mode Yokubari Sengen! Tokimeki Up! (Japan only)
Super Smash Bros. for Nintendo 3DS
Pokémon Art Academy
Pokémon Omega Ruby and Alpha Sapphire
Ultimate NES Remix
Donkey Kong Country: Tropical Freeze
Mario Kart 8
Wii Sports Club
Hyrule Warriors (Published by Nintendo outside Japan)
Fatal Frame: Maiden of Black Water (Published October 2015 outside Japan - eShop only in North America)
Bayonetta
Bayonetta 2
Super Smash Bros. for Wii U
Captain Toad: Treasure Tracker
NES Remix Pack (Japan and North America only)
= 18 game titles
2015:
Animal Crossing: Amiibo Festival
Art Academy: Home Studio (eShop only outside PAL regions)
Devil's Third
Kirby and the Rainbow Curse
Mario Party 10
Mario Tennis: Ultra Smash
Splatoon
Super Mario Maker
Xenoblade Chronicles X
Yoshi's Woolly World
The Legend of Zelda: Majora's Mask 3D
Code Name: S.T.E.A.M.
Fossil Fighters: Frontier
Xenoblade Chronicles 3D (For New Nintendo 3DS only)
Puzzle & Dragons Z + Super Mario Bros. Edition (Published by Nintendo outside Japan)
Style Savvy 3 (Japan and PAL regions only)
Animal Crossing: Happy Home Designer
Chibi-Robo! Zip Lash
Picross 3D 2 (Japan only)
The Legend of Zelda: Tri Force Heroes
Pokémon Super Mystery Dungeon
= 21 games
This is actually probably too many games for unified platform to have and it doesn't even include some eShop releases.
If they indeed go the unified library approach, Nintendo software won't be the issue so much I doubt, Nintendo should be able to comfortably release 12-16 games/year without little to no fuss. Third party content and having third parties who are satisfied with the level of sales will be more the issue.
