Spider-Man wasn't part of the original Avengers (although he was in the comics), but he is a very important part of the battle against Destructobot. His main enemies are The Lizard and Venom. He is a member of the New Avengers under the command of Luke Cage AKA Powerman (although Spidey is leader in Avengers: Earth's mightiest heroes), who works with Iron Fist and Nova. Spider Man was created by Stan Lee and was designed by Steve Ditko
There were edited pictures of penguins as Spider-Man before he appeared in 2012.