[BlackElk]

Quo primum was, in legal terms, ultra vires or beyond the powers of even a pope insofar as Pope St. Pius V purported to excommunicate in advance anyone who dared tamper in any way with his missal. This sort of thing falls into the realm of prudential judgment and not dogma. He also did not have the power to excommunicate a successor pope for wearing what he might have deemed the wrong kind of shoes or for signing in a cvolior of ink not pleasing to Pius V.

John Paul II need not lose sleep worrying about any future pope overturning the excommunications of Marcel or the decree of schism against SSPX. The SSPX may evaporate or its adherents may recant and repent and do penance for their crimes and those of their excommunicated leaders and schismatic forebears, as the case may be, in which event, the Catholic Church will, no doubt, consider their re-admission.

SSPX. Something about a flea, an elephant's leg and a yearning for an indecent act.

[Land of the Irish]

John Paul II need not lose sleep worrying about any future pope overturning the excommunications of Marcel or the decree of schism against SSPX.

Succeeding popes can supposedly overrule "Quo Primum", but they can't lift the alleged "excommunication" of Archbishop Lefebvre by John Paul II?

I'm convinced that you do think this pope to be a god.