A year from now...
Crimea will be part of Russia, the remainder of the Ukraine will be working on EU membership
Crimea will be part of the Ukraine, with Russia still using the Crimea as a naval base
Crimea will be part of the Ukraine, and Russia will have pulled itself from the area
Russia will have annexed the whole of Ukraine
We will all have died in a nuclear holocaust
Incidentally, this article on why the current situation is not a new outbreak of the Cold War is rather good.