Marvel Team Up, where heroes meet, fight, team-up or sometimes just pop in to say hello.
We start our story with Spider-Man fighting the villainous Dr. Octopus. Suddenly, Invincible pops in and accidentally takes out Doc Ock. Later, we get a nice long exposition about who Invincible is and how he made it to the Marvel Universe. Peter takes Invincible into the Avenger's tower, where they run into May and Mary Jane. After they leave, Invincible is introduced to the Avengers.
After flying around looking for Doc Ock, Spider-Man and Invincible spot him. They beat him and Invincible is thrust back into his portal. Spidey swings away.
Why the short summary? It is because this was a cheap ploy to plug a creator owned character with an established character. Invincible and Spider-Man? If this had been a good team-up or even valid reasons as to why these should meet then okay, but here, in this comic, no. It was not accomplished. In fact the story was boring and highly predictable.