Deadpool: Back In Black — Marvel
Issue: #1
During 1984's MARVEL SUPER HEROES SECRET WARS, Deadpool was introduced to an alien symbiote that went on to become Spider-Man's black costume and eventually, Venom. Okay, maybe that really took place retroactively in 2015's DEADPOOL'S SECRET SECRET WARS. But the point is, it happened! Now, did you know that after Peter Parker rejected the costume, but before it found Eddie Brock, it went slinking...
Creators: Salvador Espin, Cullen Bunn
Characters: Black Cat, Hawkeye, Captain America, Deadpool, Rogue, Spider-Man, Storm, Venom, Wolverine, Kraven the Hunter, Machine Man, Cyclops, Hulk, Wasp, She-Hulk, Thing, War Machine, Collector, Spectrum, Alex Power