According to Takungpao.
HK Ocean Park is thinking of co-operating with HKDL and this would give more convenience and discount/offerings to Consumers. They have a special concept but not yet discussed or proposed to HKDL yet.
The conceptual plan is something similar to "Disney's Park Hopper Ticket" that can be used for both parks (HKDL and HK Ocean Park).
The CEO of HK Ocean Park said, he hasn't really talked with HKDL yet, but when the time is riped , he would propose this concept to HKDL.
Source : Takungpao