Hero Bans have been confirmed via a leak to be in development. Whether they are scheduled to come out soon in a huge update that has also been confirmed to be on the way, is still unclear. One would think Blizzard would learn from their previous mistake in Season 2 and make sure to have rules set PRIOR to a season going live for competitive integrity... but it may be that Bans and other systems to fight stale metas may just be in the early phases of development similar to 1-3-2 and may be a way out, even as long as Overwatch 2. Bans as a concept though for sure work to solve the problems in the higher tiers of gameplay , the only question would be if they are necessary to be implemented game-wide or just in the ranks where meta becomes oppressive.
Sources:
Big update for OW is rumored in a few weeks, it is very likely that hero bans will be added to the game as the dev team has been working on them for a while!
— Metro (@Metro_OW) January 20, 2020
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