From what I understood in the KS, the game is almost entirely the same with some expansion content and some nicer components, so it's more like a reprint that includes some mini-expansions instead of a 2nd edition. I believe Robert Burke said there would be an upgrade pack for legacy owners. It'd honestly probably be cheaper to find someone selling their old copy (I grabbed a copy for $15) and just get the upgrade pack when it gets released later.
The second edition has a great deal of new content, and the upgrade packs were only available through the kickstarter. I may have a few left after we fullfil the Kickstarter, and will probably make those available only through my website. If you want one of these I would suggest you follows our Facebook page for the announcement. Facebook.com/robertburkegames
Copies of the standard and deluxe second edition will be available retail.
They are still in production with Panda. It'a been tough due to all the special components in this edition. But I expect some samples soon.
I hope you'll love it!
I haven't gotten around to adding it to the BGG database yet.