Mind you, if they decide to end with a nuclear attack on London on the eve of the 2012 Olympics, at least that would make Spooks: Code 9 canonical... :o)
And I'm not 100% sure if the recently announced Morse prequel means that Lewis will be coming to an end.
And...I've never seen the original Dirty Dancing (at the time it wasn't really my cup of tea, but I suspect I'd quite like it), but...is a remake really necessary?