I read that there are some Bishops in remote parts of the world who are looking for priests. For example, one Bishop has approx 4 priests ministering to thousands of people over hundreds of miles within the Amazon.
So one theory was that in areas of drastic need, perhaps the Church would allow “veteran,” married Deacons to become Priests.
However, if they do, I would of be surprised if they would need to remain celibate.
After, both Christ and St Paul taught it it was better for priest to be celibate and single so they can dedicate 100% of their time to the Church. Married men have to split their time between God and Family. A celibate priest or religious can dedicate 100% of their time and focus to God and Church.
Bishops will never be allowed to be currently married and if ever married, only married once.
BTW - regarding St Peter, tradition teaches that he most likely was a widower. Note: the Bible never mentions her and only mentions how his mother-in-law serves Jesus and the Apostles. The Bible doesn’t mention Peter’s wife assisting. Of course, this alone isn’t proof that he was widower, but it is interesting that the Bible doesn’t mention her at all. If she were alive, wouldn’t she have been a disciple and hung around the other women? Or at least helped her mother?