The runner-up was Marvel Superheroes. Disney controls that franchise too, and unless they screw it up, we can expect many more feature films about Iron Man, the Hulk, Thor, Captain America, and all the rest.
Tied for distant third we had DC Superheroes, Star Trek, Universal Monsters, James Bond, and "other." I imagine that lumped in that vague "other" we have Harry Potter, the Hobbit/Lord of the Rings, etc., which still might have some life left even though the tales seem to have run their official course.
What do you think?
P.S. A new poll is open, asking "which streaming video service has the best original content?"