I reckon it really be unconventional ...
It would be unconventional to threaten an attack and then not do it
.. convention generally has an attack occuring after a threat.
I suspect nothing will happen, bit like the whole switch over from 1999 - 2000. We'll all be sitting here waiting for something to happen and it won't.
and a whole bunch of people who post in these forums will be really upset, whining about the lack of killing.