As of April 2017 there is no construction on the plots of land that are directly north and south of Chimelong Hengqin Bay Hotel:
There is construction though directly south of the theme park itself. This has not been 100% officially confirmed but it can be inferred that this is the location of the indoor marine park that was announced at the beginning of 2016.
Photos of the construction site are limited and of low quality but here are some from the past few months taken by people staying at Chimelong Hengqin Bay Hotel that have views of the construction site from their room:
Here's another angle of the construction site but unfortunately the view is obstructed by foliage:
Sources: http://m.weibo.cn/status/4080776025044095 and http://m.weibo.cn/status/4100726106370857 and http://m.weibo.cn/status/4095712981305060 and http://m.weibo.cn/status/4067556878779317 and http://m.weibo.cn/status/4079413324813942 and http://m.weibo.cn/status/4097608504620618