Now that we know Sam is going to use a goblin for the third movie (which I disagree with), I want to see a true Goblin costume. I can understand using the Goblin tank outfit from the first movie, because they had to rationalize why he dresses in a green suit with a goblin helmet. But with Harry, Sam can take it to the next level and have Harry in a real Green Goblin outfit.
That being said, I prefer the Hobgoblin costume, as it looks badass:
