7 Lessons From Entrepreneurial Supervillains

DC Comics, Wikipedia
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Roman Sionis | Batman

Roman Sionis quickly rises to vice-presidency at his family business, Janus Cosmetics, and after killing his parents, who disapprove of the woman he loves, inherits the company.

Lesson: Take your time. After one of Sionis's ideas fails miserably, he begins throwing money into the company, urging them to bring the new makeup to market quickly. The toxic product disfigures countless women, resulting in lawsuits that bring the company to bankruptcy. Bruce Wayne bailed them out.