Would it be possible for Copts to rebel against their Muslims overlords some time after their conquest? What would be the last possible date for it to happen? As far as I know, after the century of Arab rule, they didn't even dream about such scenario. Who would lead the rebellion? Personally, I don't see them rebelling while they are a part of a unified Caliphate, so maybe under the Tulunid dynasty?
To be clear, I would like to see an independent, Christian Egypt, with Coptic language of the upper classes, although the last one isn't necessary.