Little Nemo: Adventures in Slumberland (2018)

From the introduction: Most everyone dreams when their eyes close and the Sandman comes to pay a visit. Gentle dreams of drifting among the clouds. Exciting dreams spent flying over cities with the greatest of ease. Even sad dreams of loved ones long gone. And sometimes nightmares appear instead. Dark dreams where desires are twisted into horrible visions, monsters lurk in every shadow, and the impossible reaches out to force you awake panting and sweating.