Hmm, If you like that version of the 40k galaxy map, you'll love this one, it has all the awesome info on all the planets:
WWW LinkI'd say work on the damocles gulf area first because we have somebody messing with the cadian gate already. That'd be awesome. I have an idea for a campaign style map where the Imperials start out with a large presence in the Brimlock system, and have to invade the large established Tau empire in order to gain enough room to maintain their momentum, while the Tau need to get a credible delaying action so they can sap the imperial momentum before they're crippled. Sure, we'll need to do some work on it once we get the ships up and running, but having a fun scenario like that for a long game would be a very good thing. If you have any ideas for scenarios from the fluff that you'd like to recreate, go ahead, I'll help as much as I can. If you want to limit the stuff to the races we're releasing first, it's tau, chaos, and IN. Chaos v. IN suggestions are prevalent and include various bits of the gothic war, the 13th black crusade, and the first war for armageddon, as well as a bunch of other battles. IN v. Tau is rarer, but the Third Sphere Expansion, and Damocles Gulf Crudsade are prominent, while for Tau v. chaos, some scenario with chaos raiders and Tau fleets battling each other would likely be a lot of fun. Look at the tau region in the lower right hand for Kelsha'Var, not much info, but it provides plausibility.