Luke was a given. But at least we have a new producer she's never worked with before and he's Deep House ! And with Katy and Sarah writing it'll be good (DH lyrics are amazing considering the usual standard for Katy). This song has the potential to be amazing tbh. But we'll have to see what the final product is.
A Xmas single would definitely not do well lbr. They practically have 0 longevity especially if it's some generic, Luke-penned single. Hope it's just a jingle for the ad.