With the recent news that Disney has bought LucasFilm and plans to make at least 3 new films in the Star Wars series, that would make 9 films in total (presumably all linked story-wise). Would this make it the film series with the most direct sequels/prequels?
The Bond series has 23 films, however they are generally regarded as standalone movies, not having any links between them (besides the character of Bond). From research the Halloween series has 10 and Friday the 13th has 12, though again I think those films only share the main character.
I'm looking for English-language films only, that have had cinema releases (i.e. not including direct-to-DVD movies).