No Wii U version though. I wonder why?Ubisoft's announcement of the Wii version was met with surprise and ridicule from gamers who were left wondering about Ubisoft supporting a platform that has been discontinued since 2013; a Twitter user going by the handle alienaishas speculated that this was due to the Wii's very large install base, claiming that organizations such as hospitals use Just Dance as part of their patient rehabilitation programs.[4] However, a Ubisoft representative denied the rehabilitation reason, stating to Polygon, "A lot of our [Just Dance series] players are children and families who continue to play on Wii."

http://www.vgchartz.com/games/game.php?id=222187
If that site is correct the sales are as follows.
Just Dance 2019
1.Nintendo Switch- 760,000
2.Nintendo Wii- 240,000
3.PS4- 170,000
4.Xbox One- 150,000
5.Wii U- 100,000
6.Xbox 360- 70,000
So it is no surprise they would still release it on the Wii in 2019 since the 2018 Wii version was #2
I decided to look at past years sales in the series. Here they are if anyone is interested.

Just Dance 2018
1.760,000 Switch
2.390,000 Wii
3.300,000 PS4
4.210,000 Xbox One
5.170,000 Wii U
6.100,000 Xbox 360
7.70,000 PS3
Just Dance 2017
1.Wii 1 million
2.Wii U 430,000
3.Xbox One 340,000
4.Nintendo Switch 290,000
5.Xbox 360 280,000
6.PS4 240,000
7.PS3 130,000
These are just the Wii and Wii U sales from the original Just Dance up to the latest as of now Just Dance 2019
Just Dance- 4 Million
Just Dance 2- 5.25 Million
Just Dance 3- 10 Million
Just Dance 4- 6.89 Million(Wii U 380,00)
Just Dance 2014- 3.89 Million (Wii U 640,00)
Just Dance 2015- 2.09 Million (Wii U 750,000)
Just Dance 2016- 1.11 Million (Wii U 600,000)
Just Dance 2017- 1 Million (Wii U 430,000)
Just Dance 2018- 390,000 (Wii U 170,000)
Just Dance 2019- 240,000 (Wii U 100,000)
So from this I've learned that there seems to be a decent amount of Just Dance fans who still play it on the original Wii. It also tells me that the Just Dance series has taken a huge drop in popularity. From 10 million sold with Just Dance 3 to only 1.49 million with Just Dance 2019. These numbers will only drop further with the 2020 release. I'm guessing around 150,000 will sell on the Wii and the total across all consoles will barely break 1 million.
That ends my way too in depth post about the Just Dance series
