I wonder if they’re compressing the timeframe down. In the book it was 70 years since the Second Invasion and I’m not sure how long since the First Invasion. My guess based on that footage is they’re going to have the First Invasion be against basically our level of technology rather than taking place in space. Make Mazer Rackham the hero of that, then put him in command of the main space fleet for the Second Invasion rather than being in command of the reserve fleet like in the book. Normal movie compression of the story.
Or they might shrink it down to only one attack by the Buggers.
That scene with the crashed ship reminded me of the start of Wing Commander 3. This scene:
