Yes, I do believe it is a credible threat. Contrary to what the PDF Chinese may say about me, I have never said the J-20 is 'junk' or even a 'bad' aircraft. An aircraft that is a lesser performer in some areas, in comparison to another, does not mean it is a poor product.
You have good, excellent, and outstanding. China have done an excellent, if not outstanding, job with the J-20. The US takes it seriously.
You have good, excellent, and outstanding. China have done an excellent, if not outstanding, job with the J-20. The US takes it seriously.