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       WHAT IF: Fantastic Four Masterworks Vol. 15 
      
Map by GaryUK: reprints Fantastic Four #151 - #163, Giant-Size Fantastic Four #3, #4 (300 pages)
10/74: Fantastic Four #151 (18 pages + cover)
 - “Thundra and Lightning”
 
- Credits: Gerry Conway (writer); Rich Buckler (penciller); Joe Sinnott (inker)
  
11/74: Fantastic Four #152 (17 pages + cover)
- “A World of Madness Made”
 
- Credits: Gerry Conway (writer); Rich Buckler (penciller); Jim Mooney (inker)
   
12/74: Fantastic Four #153 (17 pages + cover)
- “Worlds in Collision”
 
- Credits: Tony Isabella (writer); Rich Buckler (penciller); Joe Sinnott (inker)
  
1/75: Fantastic Four #154 (19 pages + cover)
- “The Man in the Mystery Mask”
 
- Credits: Len Wein (writer); Bob Brown (penciller); Frank Giacoia and Mike Esposito (inkers)
 
- Pages 2 – 13 of the story reprints the Human Torch story from Strange Tales #127
  
11/74: Giant-Size Fantastic Four #3 (30 pages + cover)
- “Where Lurks Death, Ride the Four Horsemen” (4 pages)
 
- Chapter One: “There Shall Come Pestilence” (9 pages)
 
- Chapter Two: “And War Shall Take the Land” (7 pages)
 
- Chapter Three: “And the Children Shall Hunger” (5 pages)
 
- Chapter Four: “All in the Valley of Death” (5 pages)
 
- Credits: Gerry Conway and Marv Wolfman (writers); Rich Buckler (penciller); Joe Sinnott (inker)
  
2/75: Fantastic Four #155 (17 pages + cover)
- "Battle Royal"
 
- Credits: Len Wein (writer); Rich Buckler (penciller); Joe Sinnott (inker)
  
3/75: Fantastic Four #156 (18 pages +cover)
- “Middle Game”
 
- Credits: Roy Thomas and Len Wein (writers); Rich Buckler (penciller); Joe Sinnott (inker)
  
4/75: Fantastic Four #157 (19 pages + cover)
- “And Now the Endgame Cometh”
 
- Part 1: “Check” (8 pages)
 
- Chapter 2: “Zugzwang” (11 pages)
 
- Credits: Roy Thomas and Len Wein (writers); Rich Buckler (penciller); Joe Sinnott (inker)
  
2/75: Giant-Size Fantastic Four #4 (21 pages + cover)
- “Madrox the Multiple Man”
 
- Credits: Len Wein and Chris Claremont (writers); John Buscema (penciller); Chic Stone and Joe Sinnott (inkers)
  
5/75: Giant-Size Fantastic Four #5 (cover)
- Redone cover of Fantastic Four Annual #5
 
- Reprints stories from Fantastic Four #15 and Fantastic Four Annual #5
  
10/75: Giant-Size Fantastic Four #6 (cover)
- Cover art by Ron Wilson and Joe Sinnott
 
- Reprints story from Fantastic Four Annual #6
  
 
5/75: Fantastic Four #158 (17 pages + cover)
- “Invasion from the 5th (Count It, 5th) Dimension”
 
- Credits: Roy Thomas (writer); Rich Buckler (penciller); Joe Sinnott (inker)
  
6/75: Fantastic Four #159 (18 pages + cover)
- “Havoc in the Hidden Land”
 
- Credits: Roy Thomas (writer); Rich Buckler (penciller); Joe Sinnott (inker)
  
7/75: Fantastic Four #160 (18 pages + cover)
- “In One World and Out the Other”
 
- Credits: Roy Thomas (writer); John Buscema (penciller); Chic Stone (inker)
   
8/75: Fantastic Four #161 (18 pages + cover)
- “All the World Wars at Once”
 
- Credits: Roy Thomas (writer); Rich Buckler (penciller); Joe Sinnott (inker)
  
9/75: Fantastic Four #162 (18 pages + cover)
- “The Shape of Things to Come”
 
- Credits: Roy Thomas (writer); Rich Buckler (penciller); Joe Sinnott and Dan Adkins (inkers)
  
10/75: Fantastic Four #163 (18 pages + cover)
- “Finale” (7 pages)
 
- Part Two: “Arkon at Bay” (6 pages)
 
- Part Three: “Victory in Hyper-Space” (5 pages)
 
- Credits: Roy Thomas (writer); Rich Buckler (penciller); Joe Sinnott (inker)
   
Mockup image by: Scarlet Spider 
  
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