What do you guys think? I say it's a possibility since he needed a new eye to awaken the full potential. And plus he could have used that eye to control the Forth Mizukage. And he used that for Izanagi. Makes sense.
That would make sense considering how he only had one eye and no other source for an additional one for a while. he probably took it and had it as a spare. Maybe one of the Zetsu helped transplant it? I can imaging transplanting an eye into your own head can be tough