UPDATE: EastAsiaSoft has confirmed the game will have an March 2015 release...
Söldner-X 2 (PS Vita) certified for North America & Europe. Releasing this March! (Japan probably in April)
— eastasiasoft (@eastasiasoft) March 1, 2015
For fans of classic side scrollers, it should fill a big gap in the Vita's line-up and will hopefully spawn a few more entries.