The Catholic Apologetics ministry “Catholic Answers” confirms that Hopeful Universalism is a valid option within Catholicism. It’s also the view of the Christian philosopher Alvin Plantinga.
The new, post-Vatican II Catechism of the Catholic Church also gives us to hope that all will be saved.
• 1821 We can therefore hope in the glory of heaven promised by God to those who love him and do his will. In every circumstance, each one of us should hope, with the grace of God, to persevere ‘to the end’ and to obtain the joy of heaven, as God’s eternal reward for the good works accomplished with the grace of Christ. In hope, the Church prays for ‘all men to be saved.’