Should directors-creators plan a trilogy before the first one comes out?

Star Wars was done by Lucas but as part of the Director's guild. When he seperated from them and did Empire Strikes Back, he did it all on money from the first movie.



Terminator Salvation was declared to be first of a new trilogy, but i would think they need to see how the first new one does. All though, im sure 3 more would be great. I hope their all about the war in the future, and Arnold has said he plans a cameo in at least one of the 3.



Spiderman 4 is in the works, and SONY said before Ramni, Maguire, and Dunst even signed again that no matter the cast or director, they plan 3 new movies.



Are these good decisions or should they plan one movie at a time.Should directors-creators plan a trilogy before the first one comes out?
It would be great if they wanted to tell the story fully...



But, believe me, they are more the willing to scrap the project mid-stride if it looses money.Should directors-creators plan a trilogy before the first one comes out?
Ideally yes, but that's just not the way the movie business works. As a big movie and tv fan I wish things were planned out more in advance.



The closest you ever get to that is when films are based on a series of books (like Lord of the Rings), or when a movie is really successful and gets two sequels made back to back (Pirates).Should directors-creators plan a trilogy before the first one comes out?
Back to the Future 2 %26amp; 3 (as well as Lord of the Rings 2 %26amp; 3) were actually shot at the same time for various reasons. The movies you mentioned are almost industries with a built-in audience. A producer with money would be willing to invest in them because of this. Does it work? Sometimes, and sometimes not.