I agree with those statements, my biggest question right now is, how will they explain the symbiote? Let's face it there hasn't been a secret wars, so is it an accidental product of some company, a creature from space, what?
Also I am not entirely convinced that it is Harry in the Goblin costume, the face is always blurred, and while the person has similar features I am not convinced it is him. I am still saying that it might be the hobgoblin and next movie will see the harry green goblin, mostly by the manner of dress on the goblin and because of the grenade blowing up in his face.