Mario Kart Tour Ending 4 Years of Updates, No New Content After October

Nintendo announced Mario Kart Tour will get no new content after October's 'Battle Tour'
This ends 4 years of new content updates for the mobile game
The final tour introduced new circuits that appeared in Mario Kart 8 Deluxe DLC
With this news, the Mario Kart series will soon have no new content releasing
The announcement has made some fans sad to see Mario Kart Tour winding down

nintendolife.com

Relevant topic timeline:

9/11/2023

Nintendo Ending New Content for Mario Kart Tour Mobile Game, Pivoting Away from Mobile

Nintendo and game publisher DeNA will stop creating new content for the mobile game Mario Kart Tour, indicating a potential shift away from mobile games, although they will continue releasing existing content and it recently became Nintendo's second biggest earner on mobile after Fire Emblem Heroes.

9/11/2023

Mario Kart Tour Mobile Game Ending Active Development, But Will Remain Playable

Nintendo has announced that it will be ending active support for Mario Kart Tour on Android starting from October 4, with no major updates to the game but tours will continue on a recycling loop.