did her rewatch of 'Lebanon' and it reminded me of the question I had when the episode aired.
John had arrived from 2003, two years before the pilot. Sam and Dean clearly gave him a recap of what had happened--here is John's summary: "So I went out taking out Yellow Eyes?...So you saved the world?" Dean: "More than once." John: "Then it's all true. God, the Devil, you boys smack in the middle. Now you live in a secret bunker with an angel and Lucifer's kid." The must have mentioned God and the Darkness because later Dean says that if John doesn't go back to the past "...without everything we did--with God, the Darkness..." Mary won't exist.
So just how much did they edit what John missed?
They got the Colt
John was possessed by Yellow Eyes
Dean almost died in the car crash in the aftermath
John made a deal to save Dean
YED revealed Sam had been fed demon blood in a plot to make Sam free Lucifer
Sam was killed by another demon-blood-fed child
Dean made a deal for Sam's life
Dean went to Hell
The angel Castiel rescued him
Sam accidentally freed Lucifer (because he was manipulated by a demon and drinking demon blood--pretty sure that was edited out of what John was told)
Michael and Lucifer wanted Dean and Sam to be their vessels to start the Apocalypse
Sam jumped in the Cage with Lucifer to prevent it
Sam came back from the Cage soulless, but Death resouled him
Castiel let the Leviathans out of Purgatory
In getting rid of them, Dean ended up in Puragtory for a year
Grandpa Henry traveled through time and died helping them fight a Knight of Hell, Abaddon (So John's dad didn't really abandon him)
BTW Henry Winchester was a member of a secret society, The Men of Letters
They ended up in the bunker because Sam and Dean are legacies from Henry, and John should have been one too instead of a hunter
Dean ended up with the Mark of Cain and died fighting the angel Metatron who was trying to take over Heaven
But because he had the MOC Dean became a demon
Sam cured him but in doing so released the Darkness
Who is really God's sister, Amara
God helped them fight her but then God and his sister made up
But Lucifer got out of the Cage, came back to earth, and impregnated a woman named Kelly Kline
Her son Jack is half angel, half human, but he's just a kid and Sam and Dean and Cas are raising him
They ended up traveling to an alternate universe where they'd never been born and the Apocalypse happened, and they brought back some hunters from that world
And Michael from that world possessed Dean but they're working on how to get rid of him
(Clearly they never got around to telling John about Mary before she waltzed in.)
But what I really want to know is how did they shade John's death to make it sound like he killed Yellow Eyes?
Best I can think of is: "Well, Dad, we got the Colt from Daniel Elkins and there was a showdown with Yellow Eyes...but you didn't make it..." which only leaves a little bit out...
I'd sure love to hear the whole conversation between the three of them...