I don't think it will be up 69% for December.

It's easier to have flucuations like that when you're talking about low level sales that can be skewed in baseline relatively easily. 

For example it's not so hard to go from 40k one year to 90k the next year given a better library for instance. 

Put going from 460k (I believe this was Wii U's Dec 13) to 1+ million year over year is much, much harder.