I can even understand why they won't even guess at a release date, since so many things can get in the way... but have they even told us how much of the film has been completed?
If we knew it has taken them a year to do 15 minutes, at least we'd get SOME idea of the time involved.
Maybe the website can have a % counter that is updated to reflect how much of the film is completed. Is that too much to ask for?