Source - Gravity Rush Launches Today on PS Vita
So Sony finally confirm, that both EU and US will get Pre-order DLC with Digital Purchess of Gravity Rush.
More important they gave a DLC release date:
Spy Pack - June 26 2012 - $3.99
Maid Pack - July 10 2012 - $3.99
Military Pack - July 24 - $3.99 (If you didn't Pre-order)