Two New York-based artists (Clifton Mallery and wife Amnau Karam Eele) sued NBC Universal and the creators of the network's superhero drama "Heroes" in U.S. district court this week. The suit was filed on Thursday in Manhattan claiming that "Heroes" plot line -- about an artist who can paint the future -- was based on a short story film and painting series that the couple exhibited in 2004 and 2005.