"Insurgent" doesn’t seriously diverge from the "Divergent/Hunger Games/Maze Runner" formula until its final act.

‘The Divergent Series: Insurgent’ Rated: PG-13 Opens Friday

Up until then, this "Divergent" sequel is Young Adults Save the World generic. It’s action-packed in the extreme, as Young Heroine Tris (Shailene Woodley) and hunk Four (Theo James) of the Dauntless faction run from the armed, motorized thugs that the smug Erudite elitists send after them, with barely time for a betrayal, a moment of weakness and a break for Tris to pile on more makeup and lip gloss.

Not everyone is brave or true enough to make a revolution work. But there’s no excuse for not looking your sexiest.

The blossoming Tris-Four love affair is expedited by the terror of the chase and the convenience of zippered jumpsuits.

New factions are visited, with Octavia Spencer’s Joanna controlling her temper in leading the tolerant sweethearts of Amity, who briefly shelter our heroes.

"Go, with happiness!"

Candor faction leader Jack Kang (Daniel Dae Kim) is indeed candid, and that translates as "just," too.

A fierce Naomi Watts introduces us to the scheming/fighting "Factionless." It’s all part of the endless exposition in this post-"Harry Potter/Twilight" teen and tween film universe. There are always new factions, or factionless folk, to introduce and explain.

But this derivative fluff, memorably mocked (along with its myriad YA sci-fi cousins) last fall on "Saturday Night Live," takes a turn toward interesting when Tris, haunted by memories of her slaughtered family, tells us how she wants this insurgency to end.

"We need to kill Jeanine."

The Divergent girl has become a hardened revolutionary, and she wishes death on the leader (Kate Winslet), who killed those she loved.

At that point, director Robert Schwenktke ("Flightplan," "RED") and his screenwriters begin to transcend the material, something it took "The Hunger Games" longer to manage. We might think of the Arab Spring or the French Revolution and remember that not every insurgency leads to positive change, that every faction will have blood on its hands and that, in armed revolts, might makes right, but not righteous.

The wondrous Woodley is a more convincing tough chick here, James blandly adequate in support, Miles Teller a colorful third wheel and Ansel Elgort (as Tris’ meek brother) a colorless fourth wheel.

The fights are well-staged, the chases dull.

But as "Insurgent" wraps up, it picks up speed and depth, and gives you hope that maybe this series won’t conclude as the copy-and-paste "Hunger Games" it has felt like, from the moment the books were word-processed onto the best-seller lists.

Review by Roger Moore, Tribune News Service