Ninja Theory has released a bit of Hellblade info including PS4 Pro support:

“PlayStation 4 Pro players will have the choice between experiencing Hellblade with enhanced resolution or at a higher framerate of 60fps. High-end PC owners will have the option to play Hellblade with an uncapped framerate and in resolutions up to 4K. Hellblade on PC will also support 21:9 ultra widescreen. “