Reportedly, on the Frozenbyte Community Forums, rumours of a PC version of Trine 2 have been confirmed.
"Yes. And before anyone asks, it will come to PC in addition to any other platforms. That's all we can say right now."
They also say that the soundtrack for Trine 2 will be new.
Trine was a nice enough game I guess. It was a good way to pass the time, and was pretty to boot. Not to mention it also reminded me of some old games I used to play.
Source: Trine 2 PC Plans [Blues News]