The Vita version is already going to receive a massive downscale to be ported on the system, the 3DS would be even more so. Neither the Vita or Wii U should receive a port considering that next to no one is going to purchase it and it's wasting resources, while the 3DS is so weak in comparison to the consoles that it won't be the same game. Sure it'll receive a massive graphics downgrade, but pretty sure AI, physics, etc, will all be limited or incorrect on a 3DS version.