Coming back to overwatch after ages, how does ranked work now?

if you've been gone a really long time it may want a few games before it shows you a rank again, so don't read much into the first handful. and if you made a fresh account, competitive stays locked until you've won a set number of quick play games.

Biggest change if you left early in OW2: you don't wait for 5 wins or 15 losses anymore, the rank bar moves after every game and shows a percentage. Ranks go Bronze up to Grandmaster with divisions 5 to 1, and there's a Champion rank on top now. Role queue still gives you a separate rank per role. Expect to land a bit low after a long break, it climbs back fast if you're winning. Blizzard tweaks it most seasons though, so check the ranked info screen in game.