Sometimes a movie is just...bad. We can all watch it and see what they had in mind, how the pitch went, how the director and producers signed on and talked some pretty big stars into taking part.  And we can see the whole thing derail through to post production, delayed release, and as we watch the finished product with an ever-dwindling vestige of hope. Such is the case for Hansel and Gretel: Witch Hunters.   Why Cinema Siren is reviewing this movie at all is a fair question. I go on record as saying there is always a chance a good movie will find its way to the multiplex in January. Not the…