It is a little difficult if people start to "reserve" movies. That coming soon thing is mostly to notify people that admins will capture anyway, or to have low quality pictures that would be replaced anyway.
When someone already has the movie on DVD (or ordered it) he sometimes put a comment on the movie page to be sure to not have someone that posts it before, as he is sure to post it in the next few days.
But putting a comment "in N months I'll buy the DVD" for a movie not yet released in theatre it is a little early
And anyway there will be pictures from divx before any DVD is available, like what we have for most of the movies.