There's no such thing as Catholics...Only Christian and heathen...And I do suspect there are some Christians who attend the Catholic religion even tho I have yet to meet one who has a testimony of trusting Jesus for his/her salvation...
“...which of course will include quite a few Catholics...”
Ex-Catholics. There are no denominations on heaven.
http://gospelway.com/church/denominations.php
Salvation is of the Jews. The Gospel of Christ is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.