Nintendo appears to be removing support for Netflix on the Wii, potentially alongside whatever remains of the console's video streaming services, by early 2019.
In a post to Reddit yesterday, a user shared an email they received from Netflix regarding its discontinuation on the platform:
"Unfortunately, Nintendo will suspend all video streaming services on Wii-including the Netflix Channel-after January 31, 2019," the email reportedly read. "We hope you'll soon enjoy an even better Netflix experience with additional features on a supported device. Please visit netflix.com/wii for our device list."
Visiting the link listed in the email confirms the context of the email. Currently, the device list at the link only includes the Nintendo 3DS for Nintendo devices that Netflix functions with, though elsewhere on the site the Wii U is listed and Netflix is still operational on the Wii U at this time.
The Nintendo Switch still lacks Netflix support, though it does have Hulu (which was dropped from the Wii earlier this year) and just yesterday received the YouTube app as well.