"A larger park with more attractions will continue to draw the crowds," he said.

Tsang was one of the HKSAR government officials officiating the ceremony on Sunday together with senior executives of the Walt Disney Company, including Jay Rasulo, chairman of Walt Disney Parks and Resorts.

The HKSAR government and Walt Disney agreed earlier this year on adding the three new themed areas to expand the park by 23 percent, just months ahead of the announcement that the company and the Shanghai government planned to build a Disneyland in Shanghai.

Bill Ernest, president and managing director Asia, Walt Disney Parks and Resorts, said he believed the two Disney theme parks in Hong Kong and Shanghai will compliment rather than compete against each other.

"We think there is plenty of room. We think there is plenty of business there that supports both parks," he said.