Right now I am taking a class called "Contemporary Roman Catholic Theology" at Southern Seminary in Louisville. Our professor is a former missionary to Rome who admits that in his early years he was way too ecuminical in his actions. Now, however, he uses his experience to teach ministers how to engage Catholics.
Anyway, we have had this discussion several times and basically the Catechism is written in such a way as to allow for great interpretation among all Catholics. Some can say and do say that Protestants who willingly reject the Roman Church will go to hell. Others aknowledge that hell is specially reserved for complete atheists and those who are especially evil (like Hitler, Stalin, Hussein, and others). But for the most part, in the Catholic church today, it is a very difficult thing to get into hell. Generally you go to Purgatory for a long time and will eventually get out once you have paid enough penance.
So if you are looking for a Catholic consensus on "will all people eventually go to heaven" then you are not likely to get it. Official church doctrine is just not specific enough in this regard. You can read such articles as "Nostra Aetate," "Lumen Gentium," and "Evangelii nuntiandi" (all of which should be accessible via the internet) to get a better grasp on the language used and the possiblities of interpretation.
D.R.