China's largest e-commerce company Alibaba has said it will file to go public in the U.S. and not in Asia. The company is talking to six different banks for underwriting purposes and is expected to list on the New York Stock Exchange. The deal could be as big as $15 billion. Alibaba is as big as Amazon and Ebay combined, but that hasn't kept competitors like social media site WeChat from gaining retail business. Alibaba could file documents in April for a third quarter launch.