Has anyone noticed the battle scene with the shuttles and the one engine starship?
Look closely at the background...
Is this battle taking place at Earth's Space Dock? Isn't that Space Dock in the background...you know the one we see the Enterprise warping away from? Movies tend to do that...Give you a sense of miss direction by showing a scene of Enterprise leaving earth. Then showing a battle and the Enterprise dropping out of warp amist alot of debris.
What if that battlefield was Earth...and Enterprise was returning and that's why we see shuttles engaged in battle.