The F-15E was developed privately before the USAF issued the ETF tender. The MQ-9 was developed privately by General atomics before they anticipated the USAF's desire for an improved MQ-1. Privately developing a new aircraft in the early stages and then having the military become interested is not new at all. I agree with your points 1 and 2. SAC's J-XX could certainly be used in those roles but that does not support the idea their "J-19" is being privately or government funded. Point 3 is ridiculous -- if there's any distrust it's PLAAF towards SAC. The fact that they've only recently picked up J-11B/S and J-15 production is probably because PLAAF were commited to the platform as the current mainstay of their heavy fighter force. The same way they are commited to the J-20 as their future heavy fighter force. SAC's J-XX proposal lost for a reason, and CAC has shown themselves more than capable to take on the task of developing multiple new fighters in recent years. SAC's J-19 is probably not being funded by the air force.