The contents of issue V-3 (The War of the Roses: triumph of the Yorkists) has now been completely decided. You can find all the article choices and authors on the editorial plan page.
Otherwise, there's still plenty of time to submit articles for the next upcoming issue after that (V-4, The Caliphate of Cordoba and the reign of Almanzor). Just be sure to have any ideas in by the 15th of February.