As someone who saw this show I know Harry wasn't the Goblin, it was a fake-out that was revealed at the end of Season 2. Also it's generally established that Connors is missing an arm in most versions of Spider-Man. Still a good recommendation for a good show.
To be fair Hero, Amazing Spider-Man 2 IS a bloated mess of a movie.
Was that Ed Asner voicing Uncle Ben? That's hilarious since he voiced J. Jonah Jameson in Spider-Man: The Animated Series. Also, the creators also wanted to introduce Scorpion and the Hobgoblin.