Perhaps a Chinese project similar to how the Su-75 design learned from the Su-57 design; so a single engine J-20? A development of the J-10? The proposed stealthy J-10D? It could probably be developed relatively quickly.
Considering the PAF already operates the J-10 it would probably be keen to acquire it as well. A number of other nations, especially those facing the F-35 may want to acquire it as well.
If the recent J-10 dorsal spine photos show anything, the J-10 can still be developed further if there is a demand.
I acknowledge the follow is fan art but to used to illustrate a point. Btw, the design would have to be modified to fit two side bays or a design similar to the SAAB FS-2020 with front and rear bays; 4 BVR and 2 WVR missiles would be a decent realistic load out.
View attachment 864573
The artworks here don't work.
Material for stealth means different skin and underlying structure. Changing underlying structure is changing everything.
We haven't even gotten to the avionics and different sensors to incorporate. The passive sensors required in places that 4th gens don't use or don't bother hiding.
At this point already the engineering effort is futile.
Then there's the total change in balance and stability needs new FCS.
What this endeavor would be is like changing the Eiffel Tower to look like the Burj Khalifa. Why not just build one as intended rather than change something that has a purpose.
We haven't even gotten to the point that such a new fighter means new factory, new equipment, new staff, new skills to train and develop and mature. New costs $$$$$$$$
The purpose of J-10C as it is for PLAAF is to be budget fighter that is 100% as effective at 70% of the tasks for example. Where a bombing or recon or CAP mission doesn't requrie the range and payload or stealth of J-16 or J-20 or even a J-11A.
So such a project is silly, stupid, not worthwhile, expensive, defeats the purpose of the original which has still a valid and useful purpose (cheap and fast to make while advanced and capable enough).
So much more to say but can't be bothered.
Let's just conclude these sorts of entertaining ideas as nothing more than silliness and fantasy thinking sometimes just for fun.
I agree that PLAAF has little demand for the air force version of the J-35.
However, military issues are often the continuation of political issues, and we should also consider the political necessity of the air force version of the J-35.
Not only Pakistan, many countries will need the air force version of the J-35 in the future.
As we all know, PLA is not short of funds.
That would be corruption and a waste of resources. A less than optimal spread and allocation.
If we do see it in PLAAF, it is either corruption to favor SAC a bit and give them a PLAAF contract too for 5th gen fighter or it is because 6th gen is further away from service that somehow also coincides with J-3x for PLAAF being useful... even if it is useful by being easier to make and cheaper than J-20. I doubt that since it is double engined. That is already enough to tell us J-35 and J-3x hypothetical are not inexpensive at all and won't be cheap to run.