A true Traveller movie wouldn't be generic scifi. You'd have to include those things that are very distinctive about Traveller.
If I were writing a Traveller movie, I'd set it in the most well known sector, the Spinward Marches, just before the Zho's invade.
I'd feature a crew and a standard tramp freighter christened Beowulf as they try to stay legit but dip into extra-legal activity in order to make the ship's payment. The poster would show the ship, damaged and lost in space, alone, with the words below the movie's title, "This is the Beowulf calling. Mayday, mayday."
The space combat scenes would be tense, dramatic fair similar to the old WWII submarine movies, featuring missiles instead of torpedoes. This movie would have something no other film has featured: sandcasters.
The aliens in the film would be truly alien--not just humans in a funny suit. I might involve the first film with something about the Ancients, but I'd definitely have Zho spies and a pre-war feel to it all.
If the film is successful, the sequel would go a step farther into a full-out conflict, highlighting the communication problems in an interstellar conflict. I'd show the Imperial Marines and other forces at work on a planetary invasion, from oribit to ground (complete with forward observers and ortillery).
The first film would be called, simply, Traveller.
The second film would be called, Traveller: The Fifth Frontier War.
And, if we're lucky enough to get a third film, it might be called, Traveller: The Secret of the Ancients.
