First, Walt Simonson's Ragnarok story, where we see Odin and Surtur fall....
Second, Thor vs Seth, where we will see Odin's triumphant return, along with Surtur, and Thor "finally" beating the flame demon in his father's stead.
That's too much ground to cover first of all and you don't want a direct overlap with the upcoming movie. It's almost like a Marvel only Amalgamverse in terms of the story elements they are using for the film. The more I see of it, the more I realize that it's a lot like Ultimate Thor. I like the movie don't me wrong, but if one uses the Casket of Ancient Winters as an example there are going to be radical departures from 616. We are no longer talking about a long lost artifact guarded by a mortal. Not when it's been sitting in Odin's vault the whole time! In this version the Frost Giants lay claim to it and given their elemental nature it makes more sense to me than the comic did. That said, we still don't know if and how the Dark Elves (in the original script) are going to be involved etc. Perhaps an animated series would be the best vehicle for a straight adaptation of the classic comic we all know and love.