Every since the release of the SNES in 1991 Nintendo follows a certain software strategy. That strategy is release most of the big 1st party games within the 1st two years. Here is what I am talking about (1st party is Nintendo devloped or a company that Nintendo 100% owns like Retro)

SNES  
Super Mario World(1991)
F-Zero (1991)
PilotWings(1991)
Super Mario Kart (1992)
The Legend Of Zelda: ATTP (1992)
Star Fox (1993)
Super Metroid (1994)
Super Mario World 2: Yoshi's Island (1995)

1st two years count: 5
The Rest : 3 (Bolded)

N64
Mario 64 (1996)
Pilotwings 64 (1996)
Star Fox 64 (1997)
Mario Kart (1997)
F-Zero X (1998)
Yoshi's Story (1998) 
Legend of Zelda : OoT (1998) (This one barely falls off the two year line)
Legend of Zelda : MM (2000)
Dr.Mario 64 (2001) 

First Two years: 6 games
The Rest (Bolded) : 3 games

GBA
F-Zero MV (2001)
Mario Kart Super Circuit (2001)
Wario Land 4 (2001)
Metroid Fusion (2002)
Wario Ware  Mega Microgame$(2003)
Mario VS Donkey Kong (2004)
Mario VS Donkey Kong March on the Minis (2005)

Wait?!?! Was that really all they released for 1st party games on the GBA that wasn't ports? How the hell did this thing sell 80 million units?
Anyway 
First two years : 4
The Rest (Bolded) : 3

Gamecube
Luigi's Mansion (2001)
Pikmin (2001)
Animal Crossing (2002)
Super Mario Sunshine (2002)
Metroid Prime (2002)
The Legend of Zelda: Wind Waker (2003)
Mario Kart Double Dash!! (2003)
Pikmin 2(2004) 
Metroid Prime 2:Echos (2004)
Donkey Kong Jungle Beat (2005)
The Legend Of Zelda (2006)

First 2 years games : 7
Rest (Bolded) : 4 (Zelda inflates this by one title)

Nintendo DS
Super Mario DS? (2004) I am not sure to include this one. Nah. I change my mind since I do not count ports.
Yoshi Touch & Go (2005)
Nintendogs (2005)
Mario Kart DS (2005)
Animal Crossing Wild World (2005)
Metroid Prime Hunters (2006)
Brain Age (2006)
Tetris DS (2006)
New Super Mario Bros (2006)
The Legend Of Zelda : Phantom Hourglass (2007)
Rhythm Heaven (2008) 
Mario VS Donkey Kong  Mini Land Mayham (2010)
First two years games : 8
The Rest : 3 and a bunch of small DSi Ware games (Bolded)

Wii
The Legend Of Zelda : TP (2006)
Wii Sports (2006)
Excite Truck (2006)
Wii Play (2007)
Brain Age Wii Degree (2007)
Metroid Prime 3 (2007)
Super Mario Galaxy (2007)
Mario Kart Wii (2008)
Wii Fit (2008)
Wii Music (2008)
Animal Crossing City Folk (2008)
New Super Mario Bros Wii (2009)
Wii Fit Plus (2009) Not counting this in the total
Wii Sports Resort (2009)
Wii Party (2010)
Super Mario Galaxy 2 (2010)
Donkey Kong Country Returns (2010)
Xenoblade (Released whenever it wanted to)
The Legend of Zelda: SS (2011)
Wii Play Motion (2011)
Rhythm Heaven
Mario Party 9 (2011)
Games in the first two years : 11
The Rest : 10 (Bolded)

3DS 
Nintendogs + Cats (2011) 
Mario Kart 7 (2011)
Steel Diver (2011)
Super Mario 3D Land (2011)
New Super Mario Bros 2 (2012)
Animal Crossing New Leaf (2013)
Brain Age :Concentration Training (Another title that released whenever it wanted)
Mario VS Donkey Kong Mini Land Mayham (2013)
The Legend of Zelda : ALBW (2013)
Tomodachi Life (2014)
Animal Crossing Happy Home Designer (2015)
The Legend of Zelda Triforce Heroes (2015)
Rhythm Heaven (2016)
Mario Maker (2016) Nah Port 
1st two years : 5 games
Rest (Bolded): 7 games (This is the the first time this is more than the 1st two years)

Wii U 
NSMBWIIU (2012)
Nintendo Land (2012)
Pikmin 3 (2013)
Wii Fit U (2013)
Wii Party U (2013)
Super Mario 3D World (2013)
Captain Toad (2014)
Donkey Kong Country Tropical Freeze (2014)
Animal Crossing Amiibo Festival (2015)
Splatoon (2015)
Mario Party 10 (2015)
Xenoblade X (2015)
The Legend of Zelda :  BOW  (2017)

1st two years : 8 games
Rest (Bolded) : 5 games

Nintendo Switch
Zelda : BOW (2017)
Arms(2017)
Splatoon (2017)
Mario Oddssey(2017)
Xenoblade 2 (2017)
1st Two years : 5 games 

Nintendo's software strategy
When Nintendo releases a system they unlesh their entire 1st party might for the 1st two years in the system's life cycle. This is to make sure the system launches hard and fast in the begining. If the system does not sell hard in the 1st two years than the system fails. The Switch shows at least year one started fast and hard. However the reason why Nintendo has mostly a two year life cycle is because they have to move on to another system. When 1st party DS games were done the company worked on Wii games. When they were done with Wii games they moved on to 3DS games and so on and so forth. This means that if Nintendo messes up in the 1st two years than there is no way for the system to recover. This is why the 3DS and Wii U sold so badly compared to the DS and Wii. 

Could there be a Second Nintendo 1st party Wave?
Lucky for the Switch it does not have this problem. There will be no new system in four years. (Unless Nintendo losses their minds). This means that once the 1st party game are out they will work on more Switch games. That means starting at around 2019 and 2020 we could have a scond wave of 1st party support. This is huge. No other Nintendo system has had this. Except for the NES. (Which had a monopoly for awhile). 

What is means if there is a 2nd Nintendo party Wave
Nintendo will not need to waste time and release another Mario or Zelda in the second wave.  In the second wave of 1st party titles we could see NEW IPs. This is  even more huge because if Nintendo can make another big IP that will blow up sales even more! In 7th generation Nintendo blew up because their New IPs became super popular.(Over simplifiying here a bit) In the NES era the same thing happened there. Zelda and Super Mario Bros came in the 2nd wave.  (NES came out in 1983 in Japan). The potential for the Switch is really high because not only is this true for 1st parties but it is also true for 2nd parties as well.  

Are we in the calm before the Switch explosion?

Why no Pokemon or Fire Emblem is in this
When I put first party games I meant internally developed or companies that Nintendo 100% owns. Retro Studios is allowed but not Intelligent Systems. So games like Pokemon and Fire Emblem are not on there because they are not internally developed.  I will have to discuss what this means for 2nd party later. Right now I am just focusing on 1st party titles.  

Can't wait to read this once i'm done narrowly passing my two online classes

Don‘t know, but I hope it‘s getting a Wave Race.

Why did you forget the Legend of Zelda: The Minish Cap? And where is Super Smash Bros for Wii U and 3DS

You didn't include Spirit Tracks?

Is this an "official strategy" or just something you noticed? Cause I gotta say ... this is very shakey ground to walk on, lol.

I think Pokemon might as well be considered first party too. I mean, Nintendo owns 33% of The Pokemon Company, but they also own an undisclosed percentage of Creatures Inc., who own another 33% of Pokemon.

In my opinion those games should be on the list, but I think he's strictly only listing games made by internal Nintendo. Minish Cap is Capcom and Smash Bros is Bandai Namco if I recall correctly. 

Even then, he's missing yoshis wooly world.

So many missing titles. I cannot make an educated conclusion unless I put in more work.

You forgot Metroid Fusion for GBA.

Definitely, not only that, but Switch will most likely have another 3D Zelda, another 3D Mario and another Mario Kart.

By this logic and the hybrid nature of the device wouldn't there be four waves of 1st party titles planned for the Switch?