Is it a hypothetical scenario?
If part of the propellor detatches the eccentric weight could dislodge the engine. It happened to a twin in the UK about 10 years ago. As I recall the aircraft entered a spin which the pilot recovered from and landed.
I also agree with IO540 that the despite the fact the CofG is probably out of limits it does not necessarily make it unflyable. After all people must fly aircraft out of offical CofG in the same way they fly them over MAUW. They still take off (but not legally). The structural limit will be higher than the published limit.
I guess it comes down to where the CofG ends up and how much force the tailplane can produce to counter the pitching moment (and at what speed).
Thinking about it the cofg would be aft of the cofp making stability interesting as well.