I could hardly believe this announcement, but am super excited! Especially hearing that Mark has been working on them! I'd expect to see building sets at first, but guess it would be likely that Brickheadz and/or CMFs could come in the future. And like everyone else, hoping that this could mean more Blizzard building sets in the future. It'd be nice for there to be sets for fans of as many Blizzard games as possible!
For those wondering, I'd definitely say Overwatch is still very popular. I funnily enough haven't played in months myself, but watch Overwatch League regularly. It's run just like any other sports league, with casters, stats, teams, playoffs, etc. The production value is incredible, and they average over 100K viewers four nights a week on Twitch. I have no doubt in my mind the League will continue to become more popular, especially with how good things have looked/been in their 1st season.