The Catholic Church has demoted saints like Christopher from the universal calendar after learning that they never existed, but as far as I know they’ve never reversed sainthood after a horrendous scandal had been uncovered. Since Pope Francis seems to care about public relations, I would advise him to slow down. After all, with abundant evidence that Pope John Paul II shielded pedophile priests, what’s the rush? Sainthood is for an eternity, so a few more years shouldn’t make much difference.
MORE: http://www.washingtonpost.com/blogs/on-faith/wp/2013/07/09/no-track-to-sainthood/