The version available on Kickstarter is a special Collector's Edition that is exclusive to Level 99 Games. Currently, there are no plans to produce any other edition of this game, nor to make it available for retail stores.
After Kickstarter, this product will remain available exclusively in Level 99 Games' online store, while supplies last and at full MSRP ($129).
The Collector's Edition will be printed in limited quantities, and will not be going to retail. So, the best way to reserve your copy is to pledge on Kickstarter.