Hmmm. Not sure what I think of this idea – it has the potential to destroy the legacy of what is probably my favourite TV series ever. One of the things that I loved about it was that it resisted the temptation to tie up all loose ends, or to give you the full background to anything. Instead, characters referred to past events as though they were common knowledge, without elaborating on them too much. For me, that both makes things sound more authentic, and feels truer to life.
I'll want to see the film all the same, though.