User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-50.66.45.82-20130304225623/@comment-5749125-20130305000847

You have to remeber this is a new series so we may not get some of the old characters... But it is still a posibilty for some of them to make an appearence in the series. Like maybe in the last book of the series we will see more old characters to reasure some readers that they are fine and it would be a nice ending to see all of the old characters and new characters together.

However I'm not sure if there will be old characters in the HoH because there's a lot of things that have to be done still in the HoH. But you never know with Rick!