Now that the WS-20 engine core, i.e. the same core as in the WS-10, is proven the engine should be available soon.
The question is if they are still interested or not given that they are currently producing the WS-18 in numbers and it's probably a lot cheaper.
When the engine for the C919 is available that will be competition for the WS-20 too. But AFAIK that project is more delayed than WS-20.
About the WS-15 we know that the project for the smaller similar generation engine, for the FC-31 derived fighter, has had success so I think it is a question of time since it will likely use similar technologies.
The question is if they are still interested or not given that they are currently producing the WS-18 in numbers and it's probably a lot cheaper.
When the engine for the C919 is available that will be competition for the WS-20 too. But AFAIK that project is more delayed than WS-20.
About the WS-15 we know that the project for the smaller similar generation engine, for the FC-31 derived fighter, has had success so I think it is a question of time since it will likely use similar technologies.