Not likely. An official reissue poster might have a new date. But the likelihood of ever seeing LFL "reissue" posters, I would think, is pretty slim. So anything else you see out there is a copy of the original. So it would contain the original copyright date and all that jazz. We did have a site linked here some time ago that gave a checklist of things to look out for to determine if a poster is real or a copy. That site has long since been relegated to Internet oblivion.