A week ago I received my Kickstarter package with WaXP in it, and I discovered that Rich had used Babylon 5, Starman, and others to help him get a feel for using a more preplanned plotline and foreshadowing in OotS.
That got me to thinking about what else he could use or have used to help. No doubt to me, the Sword of Truth series (from which my screen name comes) is in this category as it is highly preplotted as well with fantasy characters in a small group that change the world around them. Also there is the military science fiction series by David Weber with its lead character, Honor Harrington, whose tactical planning looks like it could have been an inspiration for the war section in WaXP.
If anyone else has something to add to these or contribute their own post it below.