i always thought that PT rights were owned by interplay... and seeing as they have real problems (some say that they are finished, but i didnt read that anywhere), i thought that perhaps they may release the rights, or just sell it at a cheaper price... but i dont REALLY know who owns the rights to the game. ill have to research on that...
EDIT: hmm... cant really find who owns the rights to PT now, but i know that BIS owned the right to the game...