Direct from the Overwatch Blog:
Equipped with charisma and ambition, Doomfist is a consummate tactician and one of the leaders of Talon: literally throwing down his gauntlet as he joins the fight. From his base in Nigeria, Doomfist is a commanding offense hero equipped with hard-hitting melee abilities. Driven by a belief that conflict is essential to humanity’s progress, he’s committed to advancing his vision of the future—even if the agents of Overwatch disagree with his methods.
Doomfist’s cybernetics make him a highly mobile, powerful frontline fighter. His primary attack is the Hand Cannon; this four-shot weapon fires projectiles from Doomfist’s knuckles one a time or in a single blast. With his secondary attack, Rocket Punch, he charges forward and delivers a devastating blow, knocking back any opponent it connects with and dealing extra damage if the enemy is hurled into a wall.
Seismic Slam smashes into a targeted area, knocking opponents toward him so he can deal further damage. His Rising Uppercut tosses enemies high into the air, while his passive ability, The Best Defense…, grants him shields every time he uses one of his abilities against an opponent. Lastly, his ultimate ability, Meteor Strike, causes him to leap high and drop into a targeted area, dealing massive amounts of damage.