If the Americans could upgrade the F-22 with tech and equipment that's already available on the F-35, then they've got a perfect 5th gen. I recall reading the Americans wanted to build such a fighter for Japan which would also restart their own production line and if there is scale, they can actually buy a decent number of these new F-22s. Japan didn't go for that option or rather hasn't decided to commit and it's doubtful the US would allow Japan to have a superior or even equal version to them. But the F-22 would benefit from some upgrades. Obama shut the production presumably because the F-35 is overall a better value option and they decided all the way back then that fighting China will be with carrier delivered and supported fighters since regional airbases don't stand much chance. Even if airfields can be repaired, the F-22s flying from those bases will need to land in other civilian or military fields in Japan if US airfields are being repaired after missile strikes. Nearly 200 F-22s is still plenty enough. They've actually planned and timed this well considering where PCA probably is in development.