While the roll-out won't be finalized until after the campaign, everyone will get the same figure in the same month. The caveat is- there may be color variants with the months.
The majority of customers I've canvased are fine with some variation, but I know there are some who want to make sure they don't miss any styles.
I'll add a box in the backer surveys where you can indicate if you are a completionist or not. If you are, I'll work out some sort of mail chain or notification that will let those customers know if there is a variant and if they want to make sure they get all styles (at an added cost).
My goal is to keep each month the same for all customers, but there may be times when adding a color variant allows for flexibility with the production schedule and buffers us from delaying shipments.