I know this thread is 'old', but I didn't feel like creating a new one when this was already here.
I just wanted to throw in my 2 cents. I'd love Trine 2 for the PS Vita (Trine 1 too, but that's probably never going to happen, but a man can dream~)... I'd love any Frozenbyte game on the PS Vita to be honest, past, present or future.
I would gladly buy Trine 2 a third time on my Vita. Being able to play Trine on a portable would be so much win... and on my current favorite platform even better.
If not Trine 2, then I hope something you do at some point is also on the PS Vita.