Neogenic Nightmare Chapter 1: The Insidious Six - S2-E1
Revealing mistake: When Rhino walks out of his cell, his left arm passes through the cell door.
Neogenic Nightmare Chapter 4: The Mutant Agenda - S2-E4
Revealing mistake: The same footage of Beast swinging through the trees while trying to catch up to Spider-Man is used twice. (00:08:20)
Neogenic Nightmare Chapter 5: Mutants Revenge - S2-E5
Revealing mistake: The same two guards are repeatedly shown trying to stop Wolverine and Spider-Man inside Landon's complex, despite the fact that Wolverine and Spider-Man are repeatedly shown dispatching them/knocking them out in other rooms within the complex. (00:05:20 - 00:08:15)
Neogenic Nightmare Chapter 5: Mutants Revenge - S2-E5
Revealing mistake: The same shot of two guards running towards Spider-Man and Wolverine is used three times. (00:05:20 - 00:08:10)
Neogenic Nightmare Chapter 5: Mutants Revenge - S2-E5
Revealing mistake: The shot of Hobgoblin tossing pumpkin bombs at the ceiling inside Landon's lab is a recycled shot from the previous episode when he tossed bombs at the ceiling inside the auditorium. (00:12:05)
Neogenic Nightmare Chapter 5: Mutants Revenge - S2-E5
Revealing mistake: The same shot of Beast looking dejected after Spider-Man calls him "blue boy" is used again a few minutes later when Wolverine is telling Spider-Man that he doesn't have to carry his burden by himself. (00:16:15 - 00:19:15)
Neogenic Nightmare Chapter 12: Ravages of Time - S2-E10
Revealing mistake: The shot of the Lizard whipping his tail at Silvermane and destroying a wall is recycled footage from the Lizard and Spider-Man's battle in the sewer from the first episode in the series.
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.