A recent Overwatch crash report recently name dropped Doomfist, listing "188.8.131.52 Doomfist / Summer Games" in the text. Now the Overwatch blog has officially announced he's free in the world and has his famous glove.
The blog post talks about the Helix Security maximum security installation incident that original lead to the reveal of Orisa. It confirms that the event was an attack by the Talon organisation, "with the express purpose of freeing one man: Akande Ogundimu, better known as Doomfist."
The report goes on to imply Reaper was responsible, and that Helix lost track of Ogundimu until the previous incident where the Adawe International Terminal OR15 defense robots were destroyed. Most importantly, as a result of that Ogundimu has now "reclaimed the Doomfist."
So: Doomfist is free in the world of Overwatch and has his... um, doomfist to hand. Current theories are pointing to a reveal pretty soon, listing either the current timings of previous new heroes, or August's Gamescom, which has previously seen new Overwatch announcements.
Let's all just keep an eye on Terry Crews' twitter for the time being...