Now that Fear Itself is well and truly over, I was wondering how I fit Mighty Thor into this thing. Do I include Thor #7 at the start, because that explains the first battle between Odin and Cul? I'm inclined to include Cap #619 with FI :IIM #503, just after the Book of the Skull Prologue. I feel we have to have Thor, Cap and Iron Man all included just as Fear Itself #1 starts, because that gives context to where they were all standing as that first scene of the riot in New York began.
Mighty Thor #7
Book of the Skull:Prologue
Captain America #619
Fear Itself #1
That way you can get a feel as to why Thor is concerned why Odin isn't at the congregation that starts Stark Resilients Reconstruction of Asgard.
Then comes :
Black Panther #519
Secret Warriors #20
Because these are leadups to their inclusions in FI later on.
From then on, it follows by the colour of banner on the books. Not all of them are in order, because Wolverines series happens before the Thing destroys Stark Tower, and there are a few exceptons in between.
But overall, I think Fear Itself tumbles into this chaos from very ordinary beginnings. We know Odin knew from Mighty Thor #4 that something was coming soon, and it didn't sound nice, so I think the memory Galactus gave him in that was pre-empting the Serpents rise already. Cap had just told the President (after Obama says Bucky is no longer Cap), James Barnes was a victim of conspiracy, but Rogers still gives Bucky the shield and tells him to go to DC. Iron Man just finished begging Doc Octopus to not trigger a nuke in New York, and Octavius kept a tape of that.
So here are the 3 players (Thor, Cap, and Iron Man), all primed to deal with something that nobody but Odin knew about. As Sin picks up the hammer of Skadi, the world bristles with the impending release of Nazi energies all over the world. Nobody was safe from this force, and machines of massive destruction were on the way in FI #1. Once Skadi has opened the door to the thing Odin fears the most, (the return of his fearful brother, and the eminant death of his son, Thor), the scene is set for one of the most destructive confrontations, because Odin is restricted by family ties to kill his brother.