Sins of the Fathers Chapter 5: The Rocket Racer - S3-E5
Stupidity: The huge rover that the criminals use to aid in their bank robberies tears up the streets they travel down, which leaves a huge trail for the authorities to follow and track them down. Adding to the stupidity is the fact that the highly intelligent Spider-Man doesn't think to follow the path of destruction they leave behind to locate them.
Answer: Yes. Many things that would have been in the sixth season would have had Norman Osborne returning from limbo and reclaiming the title of the Green Goblin, Richard Fisk, the son of "The Kingpin" Wilson Fisk would return as a crime lord known as "The Rose", Ghost Rider would have appeared to help Spider-Man stop Dormammu from returning to Earth and Madame Web and Spider-Man would rescue Mary Jane from limbo.