Monster Hunter Frontier G announced for Wii U, PS3 (Not Vita/3DS/PS4) [Japan Only So Far]

[NintendoPie]

DialgaMarine said:
This will give the PS3 a huge boost over in JP! Still got my fingers crossed that, after that timed exclusive portable deal between Nintendo and Capcom is up, we'll see MH4 on PS Vita. God, that would be awesome.

Neither of the things listed in your post are likely to happen.