You can play as Doomfist in Overwatch right now on PC via Blizzard’s Public Test Realm (PTR). So far, there’s been no mention as to when Doomfist would be available for all. Given Blizzard’s past history with Orisa, you can expect a Doomfist release date in about two weeks.
In terms of lore, Doomfist was defeated by an Overwatch strike team consisting of Winston, Tracer, and Genji and has been biding his time in prison until now. His arrival in the game should result in some interesting conversations with other characters like Reaper and Widowmaker – both of whom belong to the same organisation as him – Talon. Though he isn’t voiced by actor Terry Crews, as some would have liked following Crews’ lobbying for the role.
Prior to this, crashlogs for the game had hinted of Doomfist’s arrival to the game. There’s a mention of both – Doomfist and Summer Games. This was spotted on Reddit and the official Overwatch forums. They have since been deleted though you can check it out here.
With last year’s Overwatch Summer Games event beginning on August 2, we won’t be surprised to see it make a return around the same timeframe. Which also means we could see Doomfist being added to the game just before or after it. Blizzard hasn’t announced a new event and a hero to launch at the same time, so we doubt this would be the case here too.