We should learn filmmaking art from hollywood. You can make interesting quality films, on a (same subject) single theme. Subjects are never new / original, but the treatment should be different. Variety in storyline, characters, dialogues, enviourment are essential. Adventure, suspence, curiosity & drama are the needful elements of a sucessful film screenplay.
Not just special effects... imagination, creativity is also important in filmmaking. (There is lack of this things in today's bollywood motion pictures) One has to learn from hollywood movies.