Would you be fine with Springtrap in DBD?
If I were asked awhile ago, I would say no to the idea. However, now with FNaF going in a much mature setting and it not relying on cheap jumpscare tactics anymore, I would be fine with this once the new game this Summer comes out.
I mean, the latest project has a ton of popularity and impeccable reviews on Steam. I believe he's working with the same company who made this for their next game, which involves a literal cult and such. I'm not too knowledgeable so correct me if I'm wrong. I'm pretty sure the creator is known to be lenient with licensing and I think he'd be fine with changing up the designs a bit as well.
(Here's the other reference image, it wouldn't let me post an image of it: https://www.deviantart.com/misterfab1970/art/Stylistic-Springtrap-Render-686826438)