I thought about this some more afterward.
Tigershark-type revival would make a lot of sense. Both F-20 and Super-7 were largely meant to fill in a gap in US Exports, namely a fighter that is actually low-cost, vs. lower-cost for rich countries.
They even shared some of the same proposed systems (APG-67).
I don't think this would affect the trend of PRC development too much, as you can see even Japan and SK seek some technological independence. As mentioned, the victim would probably be J-10, but everything else would probably largely have gone the way it is going now within China.
However, I think it would really impacted the European exports market. If a F-20 type aircraft actually materialized, where would that leave Gripen? What if Mirage 2000 wasn't able to export (possibly only ROC and India)? Would Dassault still have money for Rafale?
Back in Soviet times when Stalin was still alive they shared almost all the technology they had with China.
At least the for mass production types including the MiG-21 and T-55.
Now there are different (commercial) considerations.
Don't forget the literal BIG one, nuclear weapons, lol