I haven't counted, but I think Cloud Cuckoo Palace is also winning in the new element stakes, with a whole bunch of parts in new colours. Ones that you probably never expected to see! So I don't think today's post is especially full of new elements you really need... but using a kooky part in a kooky colour in your models is always great fun.
This mutant brick might have some unique applications, as having the equivalent of an Erling without the 'headlight' at the front is useful - so long as you can fit a brick this tall into your build, and so long as your build is red! Overall it doesn't feel terribly useful to me, and given that TLG are very selective about creating new moulds, it seems a very strange choice for a new part. However, perhaps it is an important plot device. Emmet is seen sporting it most of the time, and if I'm analysing these few seconds of the official trailer correctly, it seems to be glued to him, at a critical moment in the movie - after falling through the 'rabbit hole'. The other interesting thing is that the movie version doesn't seem to have a stud on top.
As mentioned, here's my rudimentary attempt at replicating Emmet from my current collection! The LEGO Movie sets go on sale in the US on 29 December - I imagine we'll be waiting until the summer here in Europe.