After the DSi shop closing, it shouldn't be much of a surprise to see Nintendo closing down the Wii Shop soon enough, perhaps they want to focus all of their attention to the Nintendo Switch and its respective Nintendo eShop.
Sources:
http://www.kotaku.co.uk/2017/09/29/...ce=facebook&utm_campaign=buffer-nintendomagfb
https://www.gamespot.com/articles/wii-shop-channel-is-closing-down/1100-6453682/
Sources:
http://www.kotaku.co.uk/2017/09/29/...ce=facebook&utm_campaign=buffer-nintendomagfb
https://www.gamespot.com/articles/wii-shop-channel-is-closing-down/1100-6453682/