When Jeff Kaplan announced that he was leaving the Overwatch team, the official Overwatch page published an entry from him as well as an entry from his successor, Aaron Keller. Keller has been at the company for 18 years, and "has worked side-by-side with Jeff" for a long time. The new game director spoke of the early days of Overwatch as well as what awaits Overwatch 2.
"Speaking of Overwatch 2, development is continuing at a good pace," Keller wrote. "We have an exceptional vision we’re executing on, the reaction from many of you to the updates we shared at BlizzConline thrilled us, and we have exciting reveals planned for this year and beyond as we ramp to launch." Keller said. From new maps to the announcement of Sojourn, find a list of the announcements made at BlizzConline click here.
Keller goes on to say, "We’ll be sharing more frequent updates about Overwatch 2 progress and new features in the live game with you all very soon." This may refer the balancing changes that have been transferred from the Experimental to the live servers of Overwatch for the game to be a better experience for the player base.
At no point is an announcement date stated, but the Overwatch event that is closest to the date the entry was published is the Anniversary. While this is speculation, it would be a great time for more Overwatch 2 announcements to take place.