Ah, this is the "Kingdom Come" Superman, from the Alex Ross comic with the same name. The story is set in an alternate future of the DC Universe. The new generation of heroes have lost their moral compass, becoming as reckless and violent as the villains they fight. The previous regime of heroes—the Justice League—returns under dire circumstances, which sets up a battle of the old guard against these uncompromising protectors in a conflict that will define what heroism truly is and determine the future of the planet.
The Kingdom Come Superman has since then appeared a few times as an Alternate universe Superman, often for big events.