An alcoholic superhero? Well, in this day and age, why not? John Hancock (Will Smith) routinely saves the city, rescues people, but usually does so much damage that he has become a vilified crime fighter. After saving the life of a PR guy, it is suggested he go to jail on outstanding warrants to show the city that when he is incarcerated, crime rises and he is needed to keep it in check.
Yada, yada, he saves the day once again and carries off to continue fighting crime! Hancock 2 is on the way as well.