The Wedding - S5-E1
Audio problem: When J. Jonah Jameson is telling Peter he can work off his wedding gift over the next decade or two, his mouth movement is slightly out of sync with the dialogue.
The Wedding - S5-E1
Audio problem: When the orderly is telling Harry that he has visitors, his mouth isn't moving.
Six Forgotten Warriors Chapter 3: Secrets of the Six - S5-E4
Audio problem: When Kingpin is asking Scorpion if he is the traitor, his mouth movement is not in sync with the dialogue.
Six Forgotten Warriors Chapter 4: The Six Fight Again - S5-E5
Audio problem: When Dr. Groitzig is saying "It's been so many years," he has his fingers in his mouth. While it's possible to speak with fingers in your mouth, your voice will sound quite different when doing so, and Groitzig's voice sounds normal.
Secret Wars, Chapter 3: Doom - S5-E11
Audio problem: When the Lizard says "Yes, Spider-Man," his mouth is wide open and motionless.
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.