A new Overwatch beta, a more inclusive one, will be kicking off this Friday, April 15th at 9AM PDT and running through Saturday, April 16th at 9PM PDT. A short test, to be sure, but one necessary to make sure the new pose works as stated and to further test the networking backend ready just in time for the full release. That's always the hardest part it seems.
Starting this Thursday Blizzard is going to scour through Battle.net to start flagging accounts and giving them the permissions necessary to actually play. Around Thursday, when the start, you might end up receiving an email notification saying that you've been selected.
If you do happen to get in, you'll have access to the entire roster of 21 heroes available to you with three maps; Hanamura, Route 66 and Nepal. Due to the limited focus of the test, there's no Weekly Brawl or Competitive Play at all. Instead, this is all about getting as many people onto their hardware and stressing it to the absolute maximum. To that end, Blizzard has stated that for this test, you might see some unexpected downtime or even performance issues. But to not worry, that's the scope of this particular test. In other words, we'll hear plenty of complaining about it across the Interwebs, even though it's meant to happen.