Note on Frank Miller's signature: PSA doesn't have this version of Frank's signature in their database so they wouldn't certify it. Frank Miller is an artist and this signature is a self-portrait. The "F" which starts Frank's typical signature is the nose that centers this sketch, it's even bent in the same way as his actual nose (see pic). Also, the signature is large with a prominent placement, just how the creator of the franchise might sign it.
The film's other key creatives like Zack Snyder's & Noam Murro's signatures are also included on the poster, this is not a mere actor's signature, it's Frank Miller's. Poster includes the new 2025 PSA/DNA Letter of Authenticity and has never been displayed.