Pretty soon it will be a product of the last company standing.
I'm not sure that's how you get a quality airplane.
I take both large aviation Defense companies pulling out as a very bad sign, indicating one of two things:
1.) The requirements are so stringent that they will be extremely hard to meet and
2.) The state of our defense industry is such that making money on a jet trainer will be extremely difficult, leading businesses to seek opportunity elsewhere.
I think Textron Aviation Defense and Leonardo have a viable product plan in and of itself, but the question also remains how difficult the USN is going to make life for the winner. As Kelly Johnson famously stated, "Starve before doing business with the damned Navy. They don't know what the hell they want and will drive you up a wall before they break either your heart or a more exposed part of your anatomy."