Complex sentence: Jackson appeared at Comic-Con, where he unveiled more information about the films, also announcing that he wishes to turn "The Hobbit" into a trilogy and that the third film is close to entering production.
Split into simpler sentences: Jackson appeared at Comic-Con, where he unveiled more information about the films. He recently announced that he wishes to turn "The Hobbit" into a trilogy of films and that the possible third film is close to entering production.