Has he actually already said that?
Just checked and kinda typical. He's right on the line up overall; Mario RPG, WarioWare, Detective Pikachu are fairly low calibre titles in terms of sales potential. If you look at the September through November period Nintendo usually have a big Pokemon title and something else to help do heavy lifting (like Splatoon 3 last year or Mario Party the year before). This year Nintendo are (seemingly) banking on Super Mario Wonder as the lone big seller.
But mainline Super Mario in October on a ~130 million install base, the same year that a Super Mario movie has been massively popular? It's going to be a big launch and a strong ongoing seller for Nintendo. It's a flagship EPD title and a big game by any standard.