From sony's blog on the director's cut edition and new story:
This new edition comes packed not only with the original game and every piece of additional content we’ve sold to date, but a brand-new adventure for Jin alongside a bunch of new features that we’re excited to reveal.
Iki Island
If you’re a history buff, you may know that in addition to Tsushima, the neighboring island of Iki was also invaded during this time period. Today we’re excited to reveal that a whole new chapter in Jin’s journey is coming and will take place on Iki. In this new story, Jin travels to the island to investigate rumors of a Mongol presence. But soon, he finds himself caught up in events with deeply personal stakes that will force him to relive some traumatic moments from his past.
We’ll have more to share about the story of Iki soon, but today we can confirm that beyond a whole new story and new characters, this new island also features tons of new content including brand new environments to explore, new armor for Jin as well as his horse, new mini-games, new techniques, new enemy types, and much more. There are even new animals to pet!
On both platforms, Director’s Cut will also offer new Trophies to unlock for the new Iki content.
PlayStation 5-Exclusive Features
While Director’s Cut players on both PS4 and PS5 will be able to experience the Iki Island content, PlayStation 5 players will have access to a few additional new features.
We’ve heard your feedback about the lack of Japanese lip sync in the original version of Ghost of Tsushima, and it’s something we worked hard to address in this new release. Thanks to the PlayStation 5’s ability to render cinematics in real time, cutscenes in Ghost of Tsushima and on Iki Island on PlayStation 5 will now offer lip sync for Japanese voice over.
We’re also happy to confirm that Ghost of Tsushima, Ghost of Tsushima: Legends, and the new Iki Island expansion will all take advantage of haptic feedback and adaptive triggers in the Director’s Cut. There will also be enhancements to 3D audio* on PS5, as well as drastically improved load times, 4K resolution options** and framerates targeting 60 frames per second.
Transferring Your Progress
If you already own Ghost of Tsushima on PlayStation 4, you’ll be able to transfer your save to PlayStation 5 to pick up where you left off. For new players, the new Iki Island content will be available beginning in Act 2 of Ghost of Tsushima, after you’ve made your way to the Toyotama region.
Other Updates
Alongside the Director’s Cut, anyone who already owns Ghost of Tsushima will be able to download a patch containing some new updates. Once again, many of these updates are directly thanks to the constant stream of feedback you’ve been providing us since launch, which we’re extremely appreciative of.
All players will receive a patch with some new accessibility options for alternate controller layouts, as well as the option to enable a target lock-on during combat. And for the person who tweets at us all the time asking for an option to hide your quiver during gameplay: yes, we’ll be adding that, too!
Finally, for Ghost of Tsushima: Legends fans, we’ll also be releasing some new updates, including an all-new mode that we’re excited to detail in the weeks to come. All Ghost of Tsushima: Legends updates will be available at no additional charge to owners of any version of Ghost of Tsushima on either platform.