Although this does look interesting and somewhat original I wouldn't expect it to remain intact, just as the future Narnia books will most likely be tuned down as well.

I must be honest when I say that these hack propoganda fantasies don't interest me much. I have Poe's view on allegory. It detracts from the singularity of the art. I barely managed LOTR, and Tolkien swore it wasn't allegory.

I might rent it, but I'll save my cinema fare for I Am Legend.