Could a group of traditionalists get together in a provisional conclave and elect a new pope that stood for pre-vatican2 doctrine?
This has been tried. They elected this man.
This was tried by another group also. That group elected Lucian Pulvermacher.
Then there is also the Palmarian Catholic Church who had a pope who I think was supposedly chosen by divine revelation.
It was the rotten fruit of an illegal conclave. If we are to have a Pope again it will either be through an act of God, or through a legal election with the electors who have the Divine right to elect.