Today Shanghai Haichang Ocean Park has announced that the company has bid on the 12 hectares of land across the street from the park's entrance which they would use to expand the resort. Based on the layout of the expansion that they released the expansion would feature one or two new hotels plus new stores and restaurants. Keep in mind this is outside of the park itself, not an expansion of the existing theme park.
Source: https://mp.weixin.qq.com/s/2bieOGR2FwZnugrhnl4eKw