thanks, i think Ashley have released an SDK to allow the programmers of the various programs (Spriter, Spine etc...) to write themselves the plugins for their application, but the documentation is still in work... As said, i think the only thing we can do is to wait for plugins releases and maybe ASK FOR this in the various forums of the various software... i'm using DragonBones, that can export in spine format, but i will ask in the dragonball forums a native-plugin for Construct 3 when the SDK documentation will be avaiable!
Bye!