WorldLionon
This sinking feeling won't leave her alone. Sakura hears the cries of agony in her ears, and its a voice she can only recognize as herself; yet completely foreign. She delves into a world unknown to her, and suddenly, reality becomes unclear. But there's a bone-deep, lingering hope. Itachi, the name she knows, but not from where. In her dreams, he looks at her like a wounded animal; someone to pity. But she knows that it's all a ruse. The dreams get worse, and soon, they are not longer dreams. She can't leave this reality. And maybe she is a wounded animal to pity; but when it comes to survival, like a lizard, she'll sacrifice her own tail to survive.
Meanwhile, Konoha is in fear, as a great darkness creeps upon them. Disappearances, and gruesome deaths make everyone fear for the worst, but Shikamaru takes the brunt of it all. When life gives you limes, It's hard to make lemonade.
(In which Sakura can time-travel in her sleep, knows things she shouldn't, and maybe sleeps too long. Shikamaru realizes everything is connected; suspicion ensures.)