The head of a Queens casino is seeking to build a $400 million expansion to the facility that would include a new hotel and convention complex. Ryan Eller, president of the Resorts World Casino at Aqueduct Racetrack in Queens, plans to add 750,000 square feet to the complex, which would include a 400-key hotel, a 20,000-square-foot spa and resort and 140,000 square feet of convention space, the Wall Street Journal reported.