Some of that is right. Most of it is wrong.
The F22 was not cancelled in favor of the NGAD. The production line was closed for the F22 more than two decades before the NGAD was a gleam in the Pentagon's eye.
The F35 is not going to replace the A10. In all its three versions, it is a multi-mission fighter like the F18. It is inadequate at CAS and despite Lockheed keeps trying to sell it for ground attack, the Pentagon just gave the A10 a wing replacement. It will be around for at least another fifteen years. This is primarily because the F35 does not have adequate ground attack ability to replace a flying gun with over 1,000 rounds.
Likewise, the F35 is not replacing the F16. The F35 costs many times what an F16 does. Even if you do not amortize the development costs of the F35 across any proposed number of planes, the costs of the F35 are so high that it will never find its way into National Guard use. Rather, if the F16 does more than evolve the way it has for decades, it will probably morph into the F36 Kingsnake. The F16 fills the role of an inexpensive fighter that can be had en masse and sold overseas without offering allies things like stealth technology. That's NOT an F35. (Countries can get non-stealth F35s, but they are over $120M@.) Note too, the F35 is so bloody expensive and ordinance poor that the Pentagon is actually proceeding with an updated F15.
Your distinction about the X47C being a drone is a distinction without a difference. It is going to replace fighter aircraft, so there's no point precising it isn't a fighter. The distinction is no longer germane. Odds are excellent that the X47B's next gen iteration is already aboard many aircraft carriers and the public knows nothing about this. What we do know is the 47B was cheap, and tested aboard carriers almost a decade ago. Rumors are the entire body of the X47B was wound by Northrup on a single composite filament mandrel in order to keep the costs fantastically low. Whatever followed it is very likley already in service. Note that US military doctrine has always been to have more capability than it claims publicly. We don't really know publicly what followed the X47B, but whatever it is you can be sure it is relatively inexpensive.
NGAD is probably the next generation of Manta. Though it has not been revealed to the public, anyone who tracks such things fully expect NGAD will be a tailess delta wing with modern electronics upgrades. Many people in the know are calling NGAD "Manta". Whatever the true nature of NGAD, it is indeed 6th gen, has already flown, but is not yet in production.
