Sorry dumpy, I know the title is misleading, but the discussion was about theories on what was going to be the ending, based on the trailer, before watching the movie. So I edited your post to add the spoiler code.
Still, I guess that now that the movie has been out for a while, soon the answer will be obvious and known by most, but it was quite interesting to speculate.
The next discussion could be what did we think of the actual end for those of us who have watched the film.