Logan's not the only one who went back in time. Kitty, Rogue, Storm, and Blink have been tossed into the past as well, and will wreak havoc on the timeline - whether they want to or not. Crack with a plot.

Middle-Earth is ravaged by a continent-wide storm, which leaves the living dead in its wake. Thranduil's halls become destination number one for all who survive, whether the Elves like it or not. But Galadriel and Elrond know that it will be far from over even when they reach safety: whatever caused the storm, and the rise of the dead, was strong enough to topple Sauron himself.

Prompt: "Wheatley (any form will do) succeeds in killing Chell somehow. Unfortunately for him, the Chell came back- as a ghost. And now he can't ever get rid of her." Alternately, "Wheatley is an idiot, Chell is dead and pissed, and GLaDOS is still a potato."