That whole AA thing
It's still not been officially announced, however, and I understand that slots are still held. If true, AA JFK is a loss in a number of senses, there's no doubting it. Losing a network carrier to a major destination is a some kind of a wake up, but MAN is fortunate in being able to take this and still have the route pretty well-served. And we will still have a significant AA presence, which is under some pressure from competition but surely won't withdraw entirely. AA is a major player between the US and Europe, and I don't think it's fantastical to say that MAN is a no longer just a nice-to-have European destination for airlines. AA do need to get their act together though, and hopefully the PHL and ORD routes will strengthen - ORD needs to be year-round with decent metal.
If AA were to withdraw entirely, then for BA with their stake, having no direct US services by a partner from MAN would surely be too weak a position in the UK market and would have to be countered somehow. A partnership with TCX? - unlikely but not unthinkable!