First, the US army did NOT fly the Lynch family overseas. They actually made a statement that they would not because if they did it would set a precedent and thus they'd have to fly the families of every wounded soldier too.
The Lynch family was given the ticket and hotel accomodations by a benefactor (dont know if it was an individual or a company).
Second, its no surprise Jessica Lynch is the media attention. She's young, she's attractive, she got captured and later rescued in a spectacular fashion.
Thats media. When was the last time you saw a fat, old, wart-faced female narrating the news on CNN/FOX/MSNBC/Al Jazeera? I believe they call them "anchors" for a reason.
And you can bet that all the other POWS will be in the movie. Jessica's story cant really cover a 2 hour movie, especially since (thankfully) most others in the 507th survived and were rescued too.