Is "Spidey 3" The Last Installment?

Don't believe it. Producers tell Comic Con that they always saw "Spidey" as a trilogy. (Why? Because of "The Lord of the Rings" -- which made trilogies the de facto standard for fantasy tales, the "Star wars" movies and everything else you can think of. Even though LOTR ISN'T a trilogy -- it's one long book broken up into three parts.) But anyway, Tobey Maguire and everyone else is saying these three films have been great and they want to stop while they're ahead and how often can they keep coming up with better storylines? This smartly makes "Spidey 3" even more of an event. (What if they don't make any more?????) But the comic books go on and on and there's no emotional or natural "conclusion" to his storyline. So there's no reason more movies can't be made. (Though by all means they should take their time and do them right.) But no franchise that gets tremendous reviews and will gross some $800 million worldwide on ticket sales alone is going to pack it in. Not gonna happen. By the way, if you haven't seen the "Spiderman 3" teaser trailer, it's a doozy.