You'll be put into the same pool as people watching the Overwatch League.
You can also email Blizzard to enter yourself for beta access. All you need to do is start up Overwatch 2 upon release and she will be waiting for you in your hero roster. The pros have had access to an earlier build of Overwatch 2, so it's also a great opportunity to see the early high-level strategies for the game. Unlocking Sojourn in Overwatch 2 is easy to do.
Note that beta access is not guaranteed: Blizzard is giving away 1,500 beta tokens every hour, and you have to watch on a computer, on the YouTube mobile app or on YouTube's mobile website. Overwatch is growing: our player base, our team, and our game. Players new to Overwatch 2 received Sojourn and Junker Queen as a Season 1 login bonus. Overwatch League (more commonly called OWL) matches stream on YouTube, and you'll need to link your Blizzard account to your YouTube account to be eligible. As a reminder, Overwatch 1 owners automatically receive new heroes Sojourn, Junker Queen, and Kiriko, by logging in before the end of Season 2. For the opening weekend of the Overwatch League, Blizzard is giving away beta tokens for people who watch at least an hour of select games: If you weren't selected, don't panic - you still have other chances to get into the Overwatch 2.