Thought I'd toss in that we do know someone will die.
http://www.newsarama.com/NewJoeFridays/NewJoeFridays30.html
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"NRAMA: Any other post-Civil War projects that you can name? [/FONT]
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JQ: Lets see, outside of The Confession, we have a project called Civil War: Fallen Son. Its a five-issue series that is constructed within the five stages of grief. Grief over what? Well, youll have to wait and see. What I can tell you is that the series will move from character to character as they deal with a different stage of grief. All five issues are written by Jeph Loeb with a whos who cast of stellar artists. [/FONT]
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Issue #1 stars Wolverine (Denial), art by Leinil Yu
Issue #2 stars New and Mighty Avengers (Anger), art by Ed McGuinness
Issue #3 stars Captain America (Bargaining), art by John Romita, Jr.
Issue #4 stars Spider-Man (Depression), art by David Finch
Issue #5 stars
well that would kind of give the whole thing away. So sorry. But it deals with Acceptance and Im also going to hold onto the artists name for just a bit. Sorry, I know, I suck." [/FONT]
It says there will be grief after the CW, and the 5 books will deal with it, and whatever that 5th book is gives away who dies I guess.
Wolverine being first makes sense somewhat as he went off to track down Nitro on his own. I can see if either Steve or Stark die, Wolverine not fully buying it and tracking them down hence "Denial".
New and Mighty make sense two as if it's either of them, then their teams would be involved (tho we've seen what could be Stark, whereas Cage is going to be NA leader, so it could be Stark using Cap's colors in remembrance

).
Captain America also makes sense, if Stark dies then the "Bargaining" could be Rogers going to the SHRA side to save the others by making a bargain to become the new IM and leading Mighty. If Rogers dies then it could be Stark making a bargain to let NA off the hook, and this be a last issue for Captain America as Rogers, kind of a going away issue.
Spiderman can also go either way. Even if he ended up going against Stark, he did have a period where he looked up to him. I can see Spiderman getting upset with Stark's death because of how close they became. If Rogers dies, I can see Spiderman getting upset at that too.
This is the first big surprise that's really stumping me. A lot of it has been easily guessed, IMO tho even if the ending is murky chances are either Stark or Rogers die (even if they come back later somehow). That would give a definite ending to the back and forth inbetween them in this series. I hope neither dies, it just looks that way.