Going to bump this thread with some interesting developments.
Firstly, an overhead planning map has been surfaced for Six Flags Zhejiang:
From looking at this map, it seems like the park will have 8 or 9 coasters when it opens fully by 2019/2020. From what i can make out, it seems like the coasters will be:
A clone of Goliath from Six Flags Great America
A Large coaster travelling around the entrance of the park
A Mack Water Coaster
A Mack PowerSplash
A S&S 4D Free Spin/Intamin ZacSpin
A Vekoma Suspended Family Coaster 453m
A Zamperla Family Gravity Coaster
What i believe will be a Gerstlauer Spinning Coaster
Those are what i could make out, there may be more coasters that we don't know of yet. It also appears from several concept images and the overhead plan that the park will have an S&S Combo Shot Tower, a Star Flyer, a Zamperla Giant Discovery, a Rapids and several other attractions. Keep in mind that this is just speculation and this could change come park opening.
Here is in the meantime a concept image of the park:
...and here is what the site currently looks like:
A Hurricane Harbour will also be on the site of Six Flags Zhejiang for which slide parts have already began to arrive:
That all from this update.
Sources:
https://m.weibo.cn/status/4304732618688375?
http://www.themeparx.com/six-flags-china-parks/