I spruced Hal’s draft crawl up a tad, fought the commas, and made it more star-warsy:

The galaxy is united. After the heroic sacrifice of Luke Skywalker, countless systems have taken a stand in the name of RESISTANCE.

To suffocate this growing uprising, the tyrannical FIRST ORDER has silenced all communication between neighboring systems.

Meanwhile, Supreme Leader Kylo Ren is haunted by visions. Determined to destroy any threat to his rule, he seeks a powerful artifact hidden on the planet Mustafar. . . .