NPD, the market research firm that tracks mobile gaming, predicts the Wii U and 3DS will be the top three consoles by 2018.
In the past two years, the Xbox One has had a breakout year in terms of sales, and it is expected to surpass the Wii in 2019, according to NPD.
The third-party Nintendo 3DS is expected at #3 in 2019.
The Wii U has seen an uptick in sales, with sales in Japan growing more than 30 percent year over year.
NPD says sales of the Wii were higher than expected, and its Wii U launch will be followed by sales of both the new NX and the Wii Ultra.
Nintendo has also made its Switch launch in 2019 a priority, as well as the launch of the Nintendo Switch 2.
NPD predicts the 3DS and Xbox One will be #1 and #2 in 2018 and 2019 respectively.
The Wii will be on the lower end of the sales chart in 2018, with Wii U sales up 23 percent.
Nintendo will be targeting the 3D Mario Kart series in 2019 with a new title.