Despite concerns over security, politics, human rights issues and logistics, NBC Sports Group's coverage of the 2014 Olympics in Sochi is in line to set records among Winter Games in ad spend, broadcast coverage and social media support, with the biggest percentage of marketing money over more than 535 hours of airtime expected to come from automotive, financial services, telecom, retail and restaurants and the top spenders predicted to include AT&T, Visa, McDonald's, Coca-Cola, Johnson & Johnson and Comcast.