I can't believe "my" luck. First there is the Rosetta mission, which is perfectly designed to test "my" admittedly ridicule-worthy theories. Then in October 2014 a nearly hyperbolic comet makes a perilously close encounter to Mars within the telescopic range of not one but several Mars robotic craft. See Comet 2013 A1 Siding Spring
I have more predictions (I won't call them prophecies) about this one. There will be multiple nuclei, they will be black like the observed periodic comets - They will separate due to tidal forces and result in new comets, some of which will be periodic.