Given the teaser at the end of Dark Crusade showing several planets at war and a bold Relic 2007 tag, it's clear that this first attempt at persistence across a battlefield (they've been using persistent armies since their debut with Homeworld in 1999) is setting up something larger. Relic's newest expansion called Dark Crusade for the Warhammer 40,000: Dawn of War franchise is a great experiment in persistent army mechanics.
