I have seen 0 2013-released movies so far but have a lot of interest in Leviathan, Frances Ha, and Gravity.
I'm... curious about Byzantium, but this film should be the perfect excuse for hollow flash (more amusement park chaos/carnage, please!). Seems to take itself too seriously, and really- don't we kind of have Twilight for that? (Just a thought.)
(Oh yeah, I saw a lengthy review with clips and all a few months back. I feel I know the movie well enough to doubt I'd be missing out.)