It seems that the Taiwanese accidentally "leaked" the release date of Sonic Frontiers - it should be on November 15

For many, Sonic Frontiers is one of the most anticipated games of the year, and fans see great potential in an open-world Sonic the Hedgehog game. Fans have been getting plenty of details about Sonic Frontiers throughout June, which ended with a trailer during an extraneous Nintendo Direct. But to give a release so far, they don't have one. Or have they?

Reddit users have noticed that the Taiwanese retailer has posted merchandise details for Sonic Frontiers with a release date of November 15. This date has been talked about before last year. Judging by the picture attached to the advertisement, the game will get an add-on after release.

Source: Reddit