According to Konami's Twitter page, the sequel to Little King's Story will be coming out on the PS Vita via digital download in North & South America on 10/2/12. The original game was released on the Wii.
Source: Konami's Official Twitter AccountLabels: Konami, Little King's Story, News, PlayStation, PlayStation Vita, Portables, PS Vita, Release Dates, Releases, Vita