What If...? (1977) #4

• "What If... Someone else had become the Amazing Spider-Man?" – Uatu recounts how Peter Parker became Spider-Man in preparation for three alternate versions of the story...

• "What If... The Invaders had Stayed Together After World War Two?" – The Watcher reveals the last days of World War II from the perspective of the Invaders. As Captain America and Bucky disappear over the Atlantic, Torch and Toro fly into Berlin on April 30th, 1945 in an attempt to capture Hitler before he can commit suicide. When Hitler reaches for a button upon seeing them, the Human Torch believes it to be the trigger for a bomb that would destroy all of Berlin and feels forced to stop him by burning him to death. Meanwhile, Namor fights the Japanese in the Pacific and Spitfire and Union Jack protect Churchill back in London.
The remaining Invaders later meet up, learning of Cap and Bucky's deaths, and Namor and the Torches are recalled to the States to meet with President Truman while Spitfire and Union Jack remain in Britain. Truman explains that the Invaders must live on until the war in the Pacific is over. He adds to their ranks the former Liberty Legion members Miss America and Whizzer as well as a new Captain America and Bucky -- formerly the Spirit of '76 and Fred Davis, Batboy for the Yankees who once acted as a decoy for Bucky.
The new Invaders continue to fight in the Pacific until Japan's surrender, at which point they receive a new Presidential request to turn their attentions to fighting crime at home under the name of "The All-Winners Squad". They operate as such for the remainder of 1945 into 1946. One day in '46, the Human Torch decides to visit Phineas Horton's home in Boston to attempt to reconcile with his "father", taking Toro with him. When they arrive, they find Horton has made a second android, Adam-II, who has gone mad and imprisoned his creator and fashioned several other robotic servants, including duplicates of humans he intends to replace. With the arriving help of another former Liberty Legionnaire, Patriot, the Torches escape from Adam-II's trap and learn from Horton that Adam-II intends to replace a politician campaigning in Boston. The other All-Winners assemble and spread out to find the mark, and it's Captain America and Bucky that find Adam-II along with a duplicate of a young Senator Jack Kennedy. While Cap desperately sends out a flare to recall his teammates, one of the enemy androids grabs him and crushes his ribs.
The All-Winners Squad converge to fight Adam-II, who attempts to flee when Captain America miraculously returns, however he loses control of his getaway car and crashes, seemingly destroyed in the resulting explosion. When the All-Winners are alone, Captain America unmasks to reveal that he's actually the Patriot and that he had found the dying second Cap, who revealed his secret with his last breath. Jeffrey Mace vows to keep the legend of Captain America alive in honor of both the men that came before him.

NOTE: Despite being a What If? issue, this story does actually take place in regular Marvel continuity (Earth-616).

SOURCES: marvel.wikia.com, comicbookdb.com

... In the second alternative version (Earth-78227), Betty Brant is present at the demonstration and is bitten by the spider. Once again, Parker discovers the spider and takes it into his possession. Betty confides in Parker that she has spider powers and Parker aids her in becoming a heroine, designing a costume and building her web shooters. Betty fights crime but refuses to use her spider strength in battle. However, when a criminal escapes from Betty she later finds out that he killed Ben Parker, and she punches the criminal in a rage. The blow proves to be fatal. Unable to cope with the fact that she took someone's life, Betty gives up on the life of a crime fighter and goes back to living an ordinary life.

... In the third alternative version (Earth-78327), Colonel John Jameson is bitten by the radioactive spider. As was the case in the previous two stories, Parker obtains the spider. John's father Jonah Jameson learns of his son's new powers and immediately starts to endorse him in his paper and encourages him to become a crime fighter. John agrees and dons a costume and a jet pack. Like Flash Thompson he does not develop web shooters, and when the runaway space capsule falls to Earth, he relies solely on his jet pack to slow its decent. Unfortunately, the pack is not strong enough to slow the capsule's fall and he is crushed beneath it.

NOTE: After the end of the three stories, it is explained that no matter who was bitten by the spider, Parker uses the spider's remaining venom to develop a serum that grants him spider powers and he dons the mantle of Spider-Man.

NOTE: At the end of the three stories, the three heroes' careers had came to a sudden end; Flash and John's deaths and Betty's decision of giving up being Spider-Girl after the death of Ben Parker.

SOURCE: marvel.wikia.com