Looks like it was a mistake.
Take this with a grain of salt. A user in the Berserk subreddit posted an article linking to his blog (with pictures and a signature) about how he got to meet both Miyazaki and Miura. I'm in mobile so unfortunately I can't really share the pictures...but this will be absolutely huge, if true. Would it be a game though? An actual, good Berserk game perhaps? New IP?
Link to Reddit post as well...: