Fr. Robert Barron tackles the issue of whether few, most, or all people will be saved:
Rob Bell has apparently stirred up a good deal of controversy with his views about hell. Carlton Pearson, a minister ordained through the Church of God in Christ, likewise created quite a firestorm with his highly controversial Gospel of Inclusion, which essentially teaches that hell is corrective and temporary, not eternal punishment. In other words, everyone will eventually make it into heaven (sounds like Origen of Alexandria’s view, which Fr. Barron discussed in the video).
The Catechism has this to say about hell:
Our Lord warns us that we shall be separated from him if we fail to meet the serious needs of the poor and the little ones who are his brethren. To die in mortal sin without repenting and accepting God’s merciful love means remaining separated from him for ever by our own free choice. This state of definitive self-exclusion from communion with God and the blessed is called “hell”…
The teaching of the Church affirms the existence of hell and its eternity. Immediately after death the souls of those who die in a state of mortal sin descend into hell, where they suffer the punishments of hell, “eternal fire.” The chief punishment of hell is eternal separation from God, in whom alone man can possess the life and happiness for which he was created and for which he longs.
So Catholics must reject the so-called Gospel of Inclusion, as hell is not a temporary state but eternal separation from God. How many will be saved? God only knows. The Church in the meanwhile is tasked with proclaiming the Gospel.