Arc System Works has detailed the update schedule for Guilty Gear: Strive during their EVO 2022 panel, confirming content through 2023.
The developer is planning the following content through the next several months:
New Character #6.
Additional Character Color.
Others: PS5 reduced input delay, Steam reduced the connection time for the initial server connections
Crossplay Beta Test for Steam, PS4, and PS5. The global test is planned to be held during mid-September. More info such as how to join the beta will be announced soon.