The same situation has already occurred in the case of the Anglican bishops who became Catholics recently. The Catholic Church does not consider that Anglican bishops have ever been bishops in the Catholic sense. When some Anglican bishops converted to Catholicism recently, they became laypeople in the Catholic Church. If they wished to continue to serve, as priests, in the Catholic Church, they had to be ordained priests after they became Catholic. **If the Catholic Church and Lutheran groups united, hopefully Lutheran bishops, any or all of them, would humbly accept relegation to the status of laypeople just as these Anglican bishops did.**I admit though that this could be another barrier to unity.