SPN Big Bang
Possible crossovers: OTH/Veronica Mars
Pairings: Sam/Brooke, Dean/Veronica
"When Lucas Scott is found gruesomely murdered, Sam and Dean travel to Tree Hill to investigate. Meanwhile, new FBI agent Veronica Mars was originally looking into the murder; now she's looking in to the boys."
SOMEONE STOP ME PLEASE. OR TAKE THE BUNNY AND DO IT.
ETA: Officially signed up. But at least I got Bridget to do it with me! (Also, now she hates me.)