So, correct me if I have anything wrong. Jim has said that he likes alternating between Dresden Files and other series to avoid burning out and giving himself a break. Originally, the Dresden Files was supposed to be 20 case books with an apocalyptic trilogy to cap it off, thus 23 books total. That has gone up by 2 since Battle Ground and Twelve Months are extra books. We should be sitting at a projected total of 25 books. Since Battle Ground is #17 that means there are 8 more left to write (Twelve Months, Mirror Mirror, Fight Night, Dragons, ??, Apocalyptic Trilogy). Cinder Spires is supposed to be a 5 books series last I heard. That means there are 3 more left to write. Alternating with Dresden Files makes the last Cinder Spires book come out between Books 20 and 21. That means that there could be a new series of 5 books with the last one of those coming out after book 25 of the Dresden Files.
I hope that all made sense. We know that Jim has an epic swords and sandals series he wants to write that will be his ode to Lord of the Rings. I anticipate that will be the successor series to the Dresden Files. That still leaves room for another series before the Dresden Files ends. Do you think that there is a possibility that Jim would write another series in the Dresden Universe alternating with Harry's story? It would have to be completely separate from Harry Dresden and his immediate characters to avoid possible burnout. It would also have to take place in the past so as to not reveal any events from the main series. I know that there are WOJs regarding the Author wanting to write in the French/Indian War (where Ebenezer and Listens-to-Wind meet) and the Old West (featuring Luccio's hunt for necromancers). I also think that there would be enough material surrounding WWII (the second rising of Kemmler featuring Justin as a warden) to fill in a series. Any other potential storylines or ideas for another series?