In Amazing Spider-Man Annual #3, Spider-Man was offered membership in The Avengers if he could capture the Hulk and return him to Avengers headquarters. Although he did manage to capture the Hulk, Spider-Man was suspicious of what the Avengers wanted with the green-skinned monster. Feeling pity for the creature, Spider-Man decided to release him instead of turning him over to the Avengers, thus failing the test.
Spider-Man brought a new black costume back from the first "Secret Wars". Unfortunately, his nifty new threads turned out to be an alien symbiote that wanted to bond with him permanently! With Mr. Fantastic's help, Spider-Man was able to separate himself from the costume. Apparently feeling a little rejected, the symbiote would eventually bond with Eddie Brock and become the dangerous super-villain known as Venom.
When Kirby showed Lee the first six pages he'd drawn, Lee recalled, "I hated the way he was doing it! Not that he did it badly--it just wasn't the character I wanted; it was too heroic". Instead, Lee turned to Steve Ditko, who developed a visual style Lee found satisfactory.