Trivia: The final five episodes of this series are somewhat of a precursor to both the Marvel Cinematic Universe and Spider-Man: Into the Spider-Verse. The Secret Wars episodes featured a large crossover with characters from other established Marvel TV shows from the same time period, including X-Men, Iron Man, and Fantastic 4. The two-part series finale featured Spider-Man teaming up with several Spider-Men from different realities in order to stop a catastrophe that could affect all realities.
Trivia: Madame Web is voiced by Stan Lee's wife Joan. When Madame Web appears before Stan Lee in the series finale, he asks Spider-Man who that exotic lady is. When Spider-Man and Madame Web are talking about Stan Lee in the final scene of the series, Madame Web remarks that she thinks Stan Lee is truly special.
Trivia: Around the same time this show was airing, James Cameron was in the midst of developing a Spider-Man film which would have featured Sandman and Electro as the villains. Due to this plan, Sandman never appeared on this show despite being a prominent member of Spidey's rogue's gallery. Electro eventually made an appearance in the show's final season once it was determined that Cameron's film would never come to fruition, though the Electro that appeared on this show was a bastardized version of his comics counterpart.
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.