I think it could follow similar sales of the PS2 now entering its senior years:
Fiscal year ending March 31, 2025: 13.7
Fiscal year ending March 31, 2026: 7.9
Fiscal year ending March 31, 2027: 6.4
Fiscal year ending March 31, 2028: 1.9
So around 170 million in the end.
This would need a price cut of at least $50 and Nintendo supports it with new games in 2025 and 2026.