It looks like there’s another 2015 LEGO Star Wars polybag that is a smaller version of their counterpart that will also be released next year. Over on Brickset, there is an image of the TIE Advanced Prototype Polybag (30275) which has 47 pieces and is a slimmed down version of set 75082. The polybag was found at a Canadian Toys R Us. There’s no mention of it being part of a promotion or the price of it.
This is the second polybag to feature a mini version of the vehicle with the other one being the AT-DP Polybag (30274). It is based on set 75083 of the same name and is available for free with a purchase of any LEGO Star Wars product.