The 13th Floor?
Or give us the the tagline for that other movie too. d:
Crap! I didn’t consider horror.
No need, since…
…Gryper’s got it!
It has SF elements in it too.
Bridge to Terabithia? The Spiderwick Chronicles?
Oh, too late…
What movie overshadowed it? Or just say you’re gonna use that tagline next.
Wow…wasn’t 100% sure on that one.
Unleash the terror.
A little movie called The Matrix.
Cerberus? Curse? Ginger Snaps?
Nope to all.
Heh. I think I’ve heard of it.
Bah, another horror. d:
Phantom Menace (Jar Jar counts)
Clash of the Titans (Kraken was a terror)
I’m tempted to go through werewolf movies I know like
Howling?
Nope to all.
Shotgunning then:
Wolf, Wolfman, Full Eclipse, American Werewolf in Paris, Kujo, Pet Cemetary?
Hm…this makes me think of Cujo.
Cujo it is.
Cujo? Mans best friend?
AAAarrgghh! too slow!
Oh, damn, got shotgunned. 
Clever tagline… “UNLEASH” the terror.
I love and hate Cujo. I bawled my eyes out while also being frightened to death when I watched it as a kid.
Thanks for giving it to me on technicality. I can’t believe I got it. Wth?
Anyway…
A Magical Mystical Adventure
The Dark Crystal?
Labyrinth?
Neverending Story?
ETA: You gave me the idea anyway with your guesses, fastacart.
Time Bandits?