I love the idea of the guides, but the more I've thought about it, the more they seem a little premature to me. Am I the only one who thought they should first finish the ruinous power cycle before printing them? That way we would have the sum-total of all the effects and creatures of all 4 chaos gods, all the "central" action cards, and all the major careers for at least the human setting: ranging from the religious, magic, combat, and social careers. It would seem to make a little more sense to me to have all that information compiled in three full volumes. Then, if they started on the other races (elves, dwarves, etc) they could publish a racial update book one to two years later that compile all their information as well.
Who knows though, maybe they have plans to do a reprint after it's all over.