been thinking....
if there's an alternate timeline, whatever the movie is about, will be resolved, right?
then, once solved, the timeline will be restored.
so, if they will be back on track on the real timeline, they will need the correct equipment, namely ship, gadgets, and everything else.
now, if those objects ARE going to be used, why not just make the movie as it's supposed to be done in the real timeline from the beginning? -.-
if you think about it, they're doing twice the job and ruining the story. something that can perfectly be avoided.