HP/Supernatural challenger:
What if Sam had meet Harry Potter at Standford? Harry left the wizarding world after defeating voldemort looking for a normal life and finds himself
attending Standford Univesity and he meets a new student who is also running from is past. They become friends and then Jess is killed by something
supernatural and Harry Potter reveals his secrets and offers to help Sam and Dean find their dad and destroy the yellow-eye-demon...