Overwatch Hero Pools will be added during Season 21 of competitive play, removing selected Heroes from rotation every week.
This resembles other competitive tournaments where selected characters are removed from play by competing teams. Blizzard will be choosing who is in and out of teams rather than the players.
Blizzard has noted that Hero Pools is in trial and may be due to change.
Check out the video below for more information.“We are also going to keep a close eye on this system to see if the hero pool rotation cadence should be changed (e.g. weekly, daily, by match). The selection of heroes will be curated by the design team, rather than random assortment chosen by algorithm.”
Overwatch is available on PS4, Xbox One, Switch and Windows PC.