Protestantism is eventually going to disappear
In the Lord's prayer we pray "Thy Kingdom come, thy will be done on earth as it is in heaven." And we know that Jesus' will is that we be one, as He and the Father are one (John 17). So from this we can know that protestantism, along with all Christian denominations and institutions necessarily will eventually fall into one -- potentially also on this earth...?
Okay, so my actual purpose in asserting this is in wonder, how is this included in Protestant ecclesiology? And secondly, is it included enough in ecclesiology and eschatology, to govern our lives? And finally, how would you picture this unification of Churches happening on Earth?