Another eight more tracks and one character are on the way, for Mario Kart 8 Deluxe's Booster Course Pass DLC. Some content was already revealed from the Feburary 8 Nintendo Direct (The Yoshi's Island track and Birdo as a returning character), but this is the rest of what will be in this wave. Wave 4's courses have been revealed, with the following levels included:
Fruit Cup:
- Amsterdam Drift | Tour
- Riverside Park | MK GBA
- DK Summit / DK's Snowboard Cross | MK Wii
- Yoshi's Island | New course (was datamined to be a course originally for Tour)
- Bangkok Rush | Tour
- Mario Circuit | MK DS
- Waluigi Stadium | MK DD
- Singapore Speedway | Tour
Wave 4 launches on March 9th. The Booster Course Pass is available for $24.99, or can be gotten with a Nintendo Switch Online + Expansion Pack subscription.