Amazing idea but...
I personally feel deepfakes will get a huge regulatory crackdown very soon. With the release of StableDiffusion, It has now never been easier to create deepfakes. It's absolutely nuts how you can pick any instagram photo of a local girl.. brush her clothes out as mask, add "naked body" in the prompt and it perfectly undresses the woman in the photo. Works also the other way around by pre-training the model with 10 - 20 photos and unleashing your wildest fantasy on that person.
I'd say tread carefully with this since revenge porn is at an all time high at this point. As much as I'd love a feature like this, you would contribute to an evergrowing societal problem that haunts many females today... making it more accessible to create deepfakes, download and spread it around.
An option would be to start with an SLR-curated face gallery that are approved and to finetune the technology. Then after a quick lawyer-check if there's a grey area to operate in this... maybe try out user-submitted content as well.