I'm guessing the Adder is the trainer (which has a look very reminiscent of real-life jet trainers, I might add. Kudos to the designer.)
I like the storyline. It'll probably be kind of liberating to steer away from strictly following Razor and the Pegasus line of the show itself, won't it? They only offer so many opportunities.
Of course, I think we'd all like to see battles like those in Resurrection Ship playable, but those could be added in later. I'm particularly interested in what new characters you present, and how they develop. In the BtRL demo, most of your wingmen were killable, which seems like it'd make things difficult for long-term character growth!
The hidden ship is a puzzle. The outline looks like a blurred Mark VII, but a simple post-Razor Mk VII wouldn't be cause enough for all that excitement. Maybe it's some kind of bomber variant?