According to the Marvel site, these are the issues you need...
Amazing Spider-Man 529 - 531
Civil War: Opening Shot Sketchbook
Fantastic Four 536, 537
New Avengers: Illuminati
Civil War 1 - 7
Civil War: Frontline 1 - 10
Amazing Spider-Man 532 - 537
Black Panther 18
Cable / Deadpool 30 - 32
Captain America 22 - 24
Civil War: Young Avengers & Runaways 1 - 4
Civil War: X-Men 1 - 4
Daily Bugle: Civil War Edition
Fantastic Four 538 - 543
Heroes For Hire 1 - 3
Iron Man 13, 14
Marvel Spotlight: Miller / McNiven
Ms. Marvel 6 - 8
New Avengers 21 - 25
Punisher: War Journal 1 - 3
She-Hulk 8
Thunderbolts 103 - 105
Wolverine 42 - 47
X-Factor 8, 9
It seems like a no-brainer that this series will be released as a series of hardbacks next year, but how many..? And would this be in oversized or as Marvel Premiere Editions..? Personally I would prefer the latter...
I could be wrong, but it seems that some titles may be bi-monthly titles given the number of issues devoted to the series e.g. Fantastic Four 538 - 543 (6 issues), Wolverine 42 - 47 (6 issues)...
Anyway, how are you planning to follow the series..? Read them as individual issues as they come out, or wait for the collections..?

