After the events of the Spring Fling Titty-Beer and Boner-Off, the Sigma Nu chapter of Theta Chi Fraternity was in danger of losing its national charter. It was the epicenter of what STD scientists refer to with only a ten minute scream. The only thing that could save their fraternity was the greatest philanthropy project ever. So the Theta Chi brothers decided they would create an avenging spirit of justice to take to the night and fight local crime. After weeks of training, Bruce "Rich b***h" Wayne became... the Batman. This is one of his adventures.
Actual impending doom like global climate change or mass extinction just makes people bored.
In some cases, the Marvel source material just did better.