Seriously, if you have read anything Christopher Tolkien has said about the films, you would see that the chances of them selling the film rights to any of Tolkien's other stuff to them is pretty much nonexistent. The Tolkien Estate is doing rather well financially, they certianly don't need any of New Line's money to get buy, I doubt New Line could give them a bid high enough to convince them to pimp anymore film rights out to them.

@ Nanner, agreed about a del Toro film adaption of Roverandom being interesting. It would be more than interesting, it would be awesome. Del Toro would be perfect for that. The Father Christmas Letters could potentially make for a very clever film as well.