My Child's Dad and I Disagree on FNAF

During Halloween, my 4 year old saw a lot of FNAF at the Spirit Halloween. He took an interest and wanted to know what it was. I told him they are 'scary animatronics". He BEGGED me to let him watch the movie but I let him instead watch cosplayers and let him watch the updated music video for 'Stay Calm'. He's hooked. We went to an anime store so he could choose a FNAF action figure (he loves freddy and Chica most). I bought him a FNAF t shirt. He doesn't have access to screens or visit friends houses. But he loves freddy. He's also always had an affinity for the spooky (nightmare before Christmas, loved haunted houses during trick or treating, obsessed with halloween).

His dad thinks it's way too inappropriate. What do you guys think? Should I take it away altogether. I genuinely have a good relationship with my coparent. So I try and hear him out but I feel like, if our kid likes spooky, we can support in a healthy way.

I had an obsession with Chuckys Bride at 6 lol And have never committed a crime, done drugs, drink etc. I just don't think they are related.

Any guidance is helpful.