thought i'd make a separate thread for this since it concerns the xbox version. from Studio MHDR's blog post:
When we first set out to make Cuphead, we were just a tiny team of two brothers working nights and weekends on a small passion project. It is thanks to the support of the dedicated folks at Microsoft that we were able to achieve our vision for the game, and thanks to the passion of the Xbox community that Cuphead found an audience.
So, to celebrate the wonderful players who believed in us from the very beginning, we're also making another announcement: we will be bringing a free Special Update to Cuphead fans on Xbox, which will add a digital art gallery, behind-the-scenes commentary features, and playable soundtrack to the game. This update is still in the early planning stages, and we'll be taking the time to get things just right, but we will be sure to share more when we have something for you that meets the level of care and quality we always strive for.