Will PS Vita ever get a Monster Hunter title or is it Nintendo 3DS' forever?

[Pillow]

Main entry? No...

Spin-off / Paid MMORPG? Maybe

Capcom can make way more money on 3DS so why bother? 6 times the userbase= more sales, lower graphics = less development costs and also lower expectations in that domain from gamers.

Unless Vita manages to sell many units, then there's no chance.