Complex sentence: Batman 3 is the tentative title for the superhero film currently being developed by Christopher Nolan, David S. Goyer, and Jonathan Nolan and will be a sequel to 2008's The Dark Knight.
Split into simpler sentences: Batman 3 is the tentative title for the superhero film currently being developed by Christopher Nolan, David S. Goyer, and Jonathan Nolan. It will be a sequel to the 2008's The Dark Knight.