Whenever a new Overwatch hero is on the horizon, everyone tries to guess which of the three roles they'll fit into. There's been a pattern ever since Overwatch 2 came out where Blizzard releases at least one tank, one support, and one damage-dealer every year.
Blizzard has never explicitly stated it was intentional, but fans have assumed it cycled through the roles to keep the number of heroes in each role balanced. Overwatch has always had significantly more damage heroes than the rest, but everyone accepted that as a consequence of it being the most popular role.
