No, actually. He is not so stupid that he does not know that he would be proclaiming himself an impostor if he violated this.
He’d be agreeing with all the cardinals WHO PUT HIM IN OFFICE.
That’s not going to be an issue.
And as far as finding something believed by the faithful since the beginning, since Catholicism puts so much weight on *sacred tradition*, making it equal with Scripture, then all they have to do is *find* some *ancient* documents that were *lost* in the Vatican archives for all these centuries, and voila`, new doctrine.
That’s not so hard.