All that would be required is for those (who shall remain nameless) who have contracted to deliver manuscripts to do so in accordance with the agreed timescales. Unfortunately writing a supplement is a lot more work than people realise and of course the real world also gets in the way. The HYW has been passed to a different author and is a fair way through at the moment. Early Rome is completed and may well be the next release, after version 2 of the rules which is due around Salute. The Mongol supplement is released today, it was not delayed by the author but by our need to publish Milites Mundi. I have started writing Rome and the East. At present we do not have a date for the War of the Roses and this may now come after the Samurai book.
"No one ever achieved anything without making a few mistakes along the way"