Amazon has put up a listing for The Matrix Trilogy 4K Ultra HD, revealing a release date. According to the listing, the collection will be coming out on the 2nd of October in the North American region. If you are interested, you can preorder the latest home release for The Matrix Trilogy with this link from the online retailer. You can also check out what the front cover for the 4K Ultra HD release with the image located just below this paragraph.
For the uninformed, The Matrix Trilogy includes The Matrix, The Matrix Reloaded and The Matrix Revolutions.