Blizzard sent out the following
What is that melody? It’s the sound of Sigma and Role Queue now live! Harness the power of gravity and select your roles before the match begins. For more information, see below.
How Role Queue Works
With Role Queue, we’re updating the matchmaking and queuing systems in Competitive Play and Quick Play so that players choose which role they want to play—tank, support, or damage—before a match even begins. The matchmaking system will then match two tanks, two supports, and two damage heroes to create a team, and upon entering match, players will select heroes within their chosen roles. At the end of a match (in both Competitive Play and Quick Play), players will return to the main menu and select their role before queuing for the next game.Learn more about Role Queue: https://playoverwatch.com/en-us/news/23060961/introducing-role-queue
Who is Sigma?
Sigma is an eccentric astrophysicist and volatile tank who gained the power to control gravity in an orbital experiment gone wrong. Manipulated by Talon and deployed as a living weapon, Sigma’s presence on the battlefield cannot be ignored.To learn more about Sigma, visit his hero page at the following link: https://playoverwatch.com/en-us/heroes/sigma/
See you in Overwatch,
Will you be checking this out?