From the article, "Grasshopper Manufacture’s Goichi “Suda51″ Suda recently got a lot of people excited at the 2013 Taipei Game Show when he suggested that the developer was “undecided” when it would come to a Vita port of Killer is Dead. The thought of the forthcoming PS3 and Xbox 360 game also showing up on the Vita probably hadn’t even occurred to a lot of gamers. However, the idea is now out there and the more I think about it, it’s a really good one. It’s one that everyone involved with Killer is Dead should consider because it appearing on another platform could benefit the developer, Sony and Vita owners."
Maybe, closer to TGS would also be a good idea bc it will sell better there on VITA. Attach rates for VITA games are actually really good in Japan (like "Ragnarok Odyssey").