Do you like day trading the stock market? It takes similar guess work.

Considering it has dropped over $500 from its original price, I think it is close to the bottom. If Canon was just clearing the supply chain of 5D's with this event, at some point the price will probably pop back up.

In past years, Canon ran sales before the holidays. The price always seemed to go back up after the first of the year. Any guess you make is speculation, thinking it will get even cheaper might be a hallucination.