You can probably guess why that particular date was chosen.
It's Sonic's 30th anniversary, and his collection will be getting a lot bigger on the 32nd.
Sega have announced a "Plus" edition of Sonic Origins will release on June 23 to radically expand the June 2022-released classic Sonic compilation. The new additions will include:
A "Sonic Origins Plus" pack will be available from June 23 for $39.99 MSRP - as that is the MSRP of the existing release, the original will likely be discontinued digitially - with early purchasers able to upgrade for US$9.99 or equivalent. A physical edition will be available with an artbook, reversible cover, and all of the previous downloadable content.