line interview with John Semper, the reason that  the Hobgoblin was added to the show in Season One before the Green  Goblin was that plans for the character were being done before he  arrived by writers and crew members that were no longer involved. By  that time, the Hobgoblin had been made into an action figure for the  animated series that was going to be released, so Semper admitted  they had to let him stay on the series.