Oprah Winfrey became one of the most successful people in television history by hosting a daytime talk show, but when she starts at her new cable network next year, Oprah will be working nights. According to the Wall Street Journal, Winfrey's next show will be an hour-long affair called Oprah's Next Chapter. She also plans on getting out more: traveling the world to do interviews. Television industry watchers are wondering whether Oprah's brand is strong enough that it can compete 24 hours a day on her new network. Among other shows, the Oprah Winfrey Network will follow Shania Twain, the country star, in a reality series about her failed marriage.