The collection will be out March 8, 2019. It'll include soundtracks from all three films, bonus content, exclusive hard cover, collectible coffee table photo book with images from all three movies and bonus disc featuring Fifty Shades of Grey remixed album, a previously unreleased version of Liam Payne & Rita Ora's For You (Fifty Shades Freed) and additional rare remixes/bonus tracks.
You can pre-order over at amazon