Yes, we have talked about an electronic version of the two seat J-15S for a good while here. But to date, we have not seen it happen.
The PLAN is busy working up the first full squadron of single seat J-15 aircraft on the aircraft carrier, and they are doing that very carefully and very methodically.
If they are indeed building another carrier as we speak (and I believe at this point that they probably are), they are going to continue having their hands full at current production rates for the J-15 to build another full air wing of single seat aircraft for that carrier.
So, though we have seen the prototype J-15S, I am still waiting to see a second one...or two or there...and see them being flight tested.
If and when they do begin serious development of the two-seat aircraft...where do they gpo first. There are three clear versions possible.
Training, Fighter/Attack, and electronics. Which do they do first...and then in what order?
I think they may focus first on the fighter/attack version...sort of like the F/A-18F Super Hornet. I also think that ultimately that all of these may happen.
Right now, other than the prototype, they we have not seen progress towards any of these.
Time will tell.