The opening card includes the comment:
This film not yet rated. Also, not yet written, cast, shot, edited or scored.
And the tagline:
THEY NEVER FORGIVE
THEY NEVER FORGET
AND THIS SUMMER THEY'RE COMING BACK TO SETTLE THE SCORE...
The set of Hell Hazers II: The Reckoning may look familiar as the water tower from 2.08 Crossroad Blues and the cabin from 2.16 Roadkill are used. The Deer's Head on the wall has appeared in the boys' motel room in 1.14 Nightmare, John's room in 1.21 Salvation, and Steve Wandell's home in 2.14 Born Under a Bad Sign.
In the faux trailer for Hell Hazers II: The Reckoning, writer Martin Flagg is also credited as the writer of Cornfield Massacre and Monster Truck, which are illustrated with images from Supernatural episodes 1.11 Scarecrow and 1.13 Route 666. There's also a shot of the hook from 1.07 Hook Man, of Claire's desiccated hands from 2.07 The Usual Suspects, Gordon and his bloody knife from 2.03 Bloodlust and the inside of Angela's coffin from 2.04 Children Shouldn't Play with Dead Things.
A poster for the original Hell Hazer movie is seen in Smash Pow Comics. A pull quote says "Get ready for the ride of your life" -- Adrian Hrytzak, New York Film review. Adrian Hrytzak is the name of a member of the Supernatural Art Department. The poster also references Martin Flagg and Brad Redding from 2.18 Hollywood Babylon, along with other actual Supernatural crew including Jerry Wanek, Robert Leader, Kevin Parks, Warren Dunlop, Mary-Ann Liu, Meredith Glynn, Eugenie Ross-Leming, Robert Berens, Jim Michaels, and Phil Sgriccia.
When Dean is watching Shocker TV, a voice-over can be heard promoting Hell Hazers 3: It Lives Again which has the tagline: "It brought them back from Hell, again!"