We can't save the world as it stands. We lost that fight once. We can make sure that world never happens. We can stop it before it starts. And... we can't be subtle about it. We can't be clever, fiddly. This is a brute force option. If there were never any X-Men, then there'd never be Sentinel technology. If there were never any WildC.A.T.s, then there'd never be Daemonites on Earth. You get the idea. 
Appearing in 1st story
Featured Characters:
- WildC.A.T.s (Single appearance)
- Savant (Kenesha) (Single appearance)
- Voodoo (Pris Kitaen) (Single appearance)
- Lord Emp (Jacob Marlowe) (Single appearance)
- Warblade (Reno Bryce) (Only appearance; dies)
- Zealot (Lady Zannah) (Single appearance)
- Mister Majestic (Majestros) (Single appearance)
- X-Men (Single appearance)
- Kitty Pryde (Single appearance)
- Storm (Ororo Munroe) (Single appearance)
- Cable (Nathan Summers) (Single appearance)
- Phoenix (Jean Grey) (Single appearance) (As Marvel Girl in vision only)
Supporting Characters:
- Resistance Army (Single appearance)
- Sergeant Cole Cash (As Grifter and Deadeye in vision only)
- Wolverine (Colonel Logan) (Single appearance)
Antagonists:
- Daemonites (Single appearance) (Main story and flashback)
- Bio-Sentinels (Single appearance)
- DV8 (Single appearance) (disbands)
- Frostbite (Leon Carver) (Only appearance; dies)
- Ivana Baiul (Only appearance; dies)
- Bliss (Nicole Callahan) (Only appearance; dies)
- Powerhaus (Hector Morales) (Only appearance; dies)
- Freestyle (Jocelyn Davis) (Only appearance; dies)
Other Characters:
- Dr. Doom (Victor von Doom) (Single appearance) (corpse)
- Thor Odinson (Single appearance) (corpse)
- Batman (Bruce Wayne) (Single appearance) (corpse)
- Caitlin Fairchild (Single appearance) (corpse)
- God (Yahweh) (Invoked)
- Nikolas Kamarov (Mentioned) (Deceased)
- WildC.A.T.s
- Maul (Jeremy Stone) (Single appearance) (In a vision)
- Void (Adrianna Treshkova) (Single appearance) (In a vision)
- X-Men
- Charles Xavier (Mentioned) (Deceased)
- Forge (Mentioned) (Deceased)
- Jubilation Lee (Mentioned) (Deceased)
- Scott Summers (Mentioned) (Deceased)
- Nightcrawler (Kurt Wagner) (Single appearance) (In a vision)
- Colossus (Piotr Rasputin) (Single appearance) (In a vision)
- Nate Grey (Mentioned)
- Phoenix Force (Single appearance)
- Grunge (Eddie Chang) (Single appearance)
- Kenesha (First Appearance)
- Logan (First Appearance)
Races and Species:
- Kherubim (Main story and flashback)
- Daemonites (Main story and flashback)
- Angels (Referenced)
- Gods (Referenced)
- Birds (corpse)
- Bio-Sentinels
- Humans (corpse)
- Asgardians (corpse)
- Gen-Active
- Mutants
- Human-Daemonite-Kherubim Hybrids
- Sentinels (Mentioned)
- Cyborgs
- Abstract Entities
- Tigers
- Human-Titanthrope Hybrids (In a vision)
- Brood-Dameonite Hybrids (In a vision)
Locations:
- Present (Single appearance) (Main story and flashback)
- Daemon (Main story and flashback)
- Milky Way (Single appearance) (Main story and flashback)
- Earth (Single appearance) (Main story and flashback)
- United States of America (Single appearance) (Main story and flashback)
- New York (Single appearance)
- New York City (Single appearance)
- Westchester County (Mentioned) (Destroyed)
- New York (Single appearance)
- Canada (Mentioned)
- United Kingdom (Single appearance) (In a vision)
- England (Single appearance) (In a vision)
- Austria (Single appearance) (In a vision)
- United States of America (Single appearance) (Main story and flashback)
- Earth (Single appearance) (Main story and flashback)
- Hell (Invoked)
- Khera (Mentioned)
- Alternate Future (Mentioned)
- Alternate Past (Single appearance)
- Milky Way (Single appearance)
- Earth (Single appearance)
- Milky Way (Single appearance)
Items:
- Inhibitor Collar (Behind the scenes)
- Dr. Doom's Armor
- Batsuit
- Adamantium
- Wolverine's Suit (In a vision)
Vehicles:
- Heaven's Wave (In a vision)
Events:
- World War II (In a vision)
Synopsis for 1st story
- Synopsis not yet written
Notes
- Cover and indicia identify this comic as "X-Men/WildC.A.T.s: The Dark Age"