Likewise with the Corpse Bride.
However, Grim Fandango as a film could be a good or bad thing. For instance, they could make a new story line that bodges it up completely, or the medium they use could bodge it up. If I had to say a medium, it would have to be the animation they use in the game, with the same voice characterizations, the full fandango (no pun intended), and even then, it might not be as good.
Make it faithful to the game, with the same animation and voices, then yes. But personally, no offense Scorpicus, I think that plasticine is a bad idea. Also, how would you get all the bones to be separate?