Looks like a good argument for the Snowflake method [0]. This method is basically to "develop" a novel, by starting with a single sentence and gradually expanding it into the novel. In contrast, the other method (pansing) is to start writing the first chapter immediately.
For either approach you find great writers using them. It seems to be a question of personality.
For either approach you find great writers using them. It seems to be a question of personality.
[0] http://www.advancedfictionwriting.com/art/snowflake.php