Physical copies of titles such as Maleficent and Captain America: The Winter Soldier were unavailable for order on Amazon.com on Sunday. Digital copies of some of the movies in question were still available for pre-order.
Messages sent to Amazon.com and Disney were not immediately answered.
Amazon has been waging a battle against Hachette, the fourth-largest US book publisher, over the price the online retailer can charge for e-books. Hachette is owned by France's Lagardere.
A group called Authors United ran a two-page ad in the New York Times on Sunday, criticising Amazon for halting pre-orders from some Hachette authors and slowing delivery of books by Hachette authors.
The ad was signed by more than 900 writers, including Stephen King and Donna Tartt.
Amazon says pricing e-books at $14.99 or $19.99 is too expensive. It argues that cheaper e-books sell more copies and so ultimately generate more revenue and more royalties for authors.