A new Mario Kart would sell better than a new 3D Mario
You’ll get March of the Minis 6 and you’ll like it.
Cool, so
1. We don't know how far into development that is
2. Even if game X would sell better than 3D Mario, you generally want as many of your 25m+ selling IPs on new hardware as fast as is reasonable
Right now, we're looking at
Pokemon Gen 10: November 2025 or November 2026 (possibly cross-gen)
Next mainline 3D Zelda: 2028-2029
Then we have these other IPs
Massive tier:
Animal Crossing (unclear)
Mario Kart (unclear)
Huge tier:
3D Mario (unclear)
Smash Bros (VERY unclear)
Very big tier:
RingFit
Splatoon (would guess 2026-2027)
Mario Party (next one is probably 2024 and will definitely be cross-gen at most)
Luigi's Mansion (next one is probably late 2025-2026)
Basically, Nintendo has 10 really big franchises. The more of these have late entries on the Switch, the fewer can push Switch 2. This isn't as big of an issue if none of these franchises have development issues, but a lot of AAA games do. It seems like a pretty big risk to release the next 3D Mario before the Switch 2.