Why are you suspicious if the text is razor sharp?
There are very very few high-quality 27x40 repros out there because it's almost always technically and/or economically infeasible to create and sell them. Sure, the likes of Tom Loce and moviepostershop.com might sell 27x40 repros of this but they don't even try to make perfect repros. Any collector on this board would instantly recognize that their posters are repros, e.g. heavy luster paper, fuzzy text, odd-sized, odd-cropping, etc.
I doubt there's sufficient demand for this particular poster for anyone to go to the trouble of making perfect repros. Also, where are you going to get a sufficiently large digital image (at least 4000x6000 pixels) to print it? The one on MPDB is only 755 pixels:
http://www.movieposterdb.com/movie/0372784/Batman-Begins.htmlhttp://www.movieposterdb.com/poster/7d77e473I guess you could scan in an original but it's very difficult to produce a perfect repro from a scanned-in image. You'd have to recreate the text and logos for starters, which requires some significant Photoshop skills. Lot of time and effort with no real economic rationale.