I Am a Hero (DIR. Shinsuke Sato) I Am a Hero is long.   That is not often how a review will start, but that may be the most remarkable thing about this new zombie film from Japan – running at over two hours, it is needlessly long.  Otherwise, it doesn’t reinvent or make any new addition to the zombie mythos, it doesn’t have anything interesting to say, and it doesn’t really pick up until the third…