This could butterfly away both Hans Kung and Pope Benedict XVI...
Hans Kung was rather obscure before the council. His only claim to fame was writing a book about Karl Barth and getting an unexpected favorable open letter from Barth. It should be noted that within the domain of early 1960's Protestant theology Barth was regarded as a conservative. In the council's last session Kung made a name for himself showing off his real talent which was manipulating the press and hogging the spotlight. Without the council I would see him having a hard time getting the same attention.
Ratzinger OTOH had already established a reputation for himself in that branch of New Theology which emphasized
ressourcement and would indubitably have been an influential theologian without the council. In OTL his
partial turn in theology came in stages. First he was persuaded by von Balthasar that the more radical form of New Theology had dominated at the last session of the council and so they created the periodical
Communio which had an ambivalent view of the council and esp. its alleged "spirit".
The second turning point came with the student riots of 1968 which made Ratzinger fearful of a radical spirit that could cause civilization to collapse. I do not see no council butterflying away 1968 so Ratzinger would still be diverging still further from Rahner.