So I was very pleasantly surprised by John Carter of Mars. I went in expecting nothing, and had a great time. It doesn't follow any exact book storyline, but it incorporates all the salient bits of A Princess of Mars, does a very interesting take on some ideas from the Gods of Mars, and adds in a very interesting moving city that I think Burroughs would have approved of. The Tharks are awesome, there is a fair amount of blood (blue, which is what I think got it past the censors) and a high bodycount, Dejah Thoris gets a well-deserved personality addition (now she's intelligent as well as kickass!) and really, it was just all very pleasing and enjoyable.