Well, if you literally bleach off the emulsion, probably not. But, if you bleach out the silver, then the remaining clear gelatin will make an excellent substrate. So yes.

But most subbing layers on film are one-and-done. For instance, if you wet the Photo Formulary melinex before coating, it becomes useless. That's why I say that if you literally mean removing the emulsion from the film, then the remaining raw PET/TCA will probably not accept a coating.