Complex sentence: News of the second movie first broke in early 2005, suggesting that it would be written by Simon McBurney, although in December 2005, Atkinson confirmed that the screenplay was being written by himself and longtime collaborator Richard Curtis.
Split into simpler sentences: News of the second movie first broke in early 2005, suggesting that it would be written by Simon McBurney. In December 2005, Atkinson said that the screenplay was still being written by himself and longtime collaborator Richard Curtis.