Future plans of cocos2d-x 4.0

Hi there,
I am wondering what the future plans for v4.0 are at the moment. When looking into the milestones of the cocos2d-x repo: https://github.com/cocos2d/cocos2d-x/milestones
there is nothing new since months.

Are there any future plans that are just not shared over Github?

All the best,

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