Digital Bros, the parent company of Kunos Simulazioni and 505 Games has announced in its semi-annual financial report that Assetto Corsa 2 will be released in 2024. The relevant passage includes the following statements:
The on-going investments together with future acquisitions of intellectual properties are expected to take the Group to an incremental level of revenues compared to the actual, starting 2024. Numerous new productions will be released, including the second version of Assetto Corsa, created by the internal studio Kunos Simulazioni, as well as several other intellectual properties that will be communicated close to their respective launch dates.https://www.digitalbros.com/wp-content/uploads/2021/03/2021.03.09-PR-Digital-Bros-The-BoD-approves-the-Half-Year-Financial-Report-at-December-31st-2020-def-criptato.pdf
So far we can only guess in what form the simulation will appear, but it can be assumed based on the name that it will closely follow Assetto Corsa (original title) and after the popular GT3 title Assetto Corsa Competizione will again be taken up road cars and racing cars from a wide variety of eras and classes.
The planned engine for the simulation is not yet known, but with the release of Unreal Engine 5, at least some signs point in that direction.