TIMEMASTER101
After the end of everything from defeating God and all with Heaven and Hell finally loosening its grip, Sam and Dean Winchester think they've earned peace in the afterlife.
When all of a sudden, they wake up on a random highway with the Impala beside them and most of their hunter gear still in the trunk, especially in a world that feels different in ways even they can't explain.
At first, they thought Jack, the New God and ruler of Heaven, would resurrect them from death, but they soon realize that this isn't their Earth.
People are dying without signs of possession, monsters don't leave sulfur or EMF traces and some threats can't be killed by both conventional weapons and hunter methods while many are shown they are worse monsters than any creature they've encountered in their whole life.
And lurking behind every anomaly is a shadow organization that already knows what goes bump in the night and believes the safest solution is to lock it away, no matter the cost.
As Sam and Dean fall back into the usual hunt, they discover the truth that this world is governed by a global force dedicated to Secure, Contain, Protect, along with countless factions with various interests.
Hunted by black-ops teams, watched by unseen eyes, and forced to burn their identities faster than ever, the brothers take on anomalies far worse than anything they faced back home, from a monster that kills anything by looking at its face, to a statue that snaps people's neck in a blink, and an intelligent murderous lizard that no military force could able to kill.
SPOILER WARNING: For anyone who hasn't watched up to Season 15 of Supernatural, there will be details that will bring major spoilers.
DISCLAIMER: I do not own Supernatural and SCP. They belong to their respectful owners.