Well, what had happened was......

Fic title: Comes a Horseman Masterpost
Author name:cillab42
Genre: J2
Pairing: Jared/Jensen
Rating: R
Word count: 28086
Disclaimer: As far as I know this didn't happen, it's pure fiction.
Warnings: m/m, violence, mpreg, character death, bottom!jensen, alpha!jared
beta: masja_17
Summary:
The Padalecki pack had lived in peace since their young Alpha challenged then Alpha Jeffry Dean Morgan in a bid to mate with Jensen. He wasn’t supposed to survive the challenge, but he did only making one mistake; letting the former pack Alpha live. Six years later the ousted Alpha has come back for revenge and Jensen.

AO3

Part 1 -Comes a Horseman
Part 2- The Horseman's Omega
Part 3- The Wrath of the Horseman
Part 4- The Horseman’s betrayal
Part 5- The Horseman’s confrontation
final part- The Horseman’s Final Battle