As for this week, Tails, Knuckle and Amy are now available in the game, and this will be followed September and "late 2024" with even more extra content. Here's the rundown:
Super Monkey Ball Banana Rumble - Roadmap 2024
July 2024- New multiplayer stage (free)
- Tails, Knuckles & Amy (out this week)
- New multiplayer mode (free)
- Axel & Beat
- Sega costume pack
- New multiplayer stages (free)
- New multiplayer modes (free)
- Additional characters