I don't think we can make many assumptions about who will or won't be in heaven. God is the only one who can see the hearts of men. But I have one friend whose heart is pretty plain to see. He gets songs like this stuck in his head and, even more, stuck in his heart: "Lord, I want to yearn for you. I want to burn with passion over you and only you." What is this but the work of God in him?
I think it's safe to say that salvation isn't about whether you have theological concepts neatly sorted in your mental library. God brings about salvation without any help from my beliefs or my deeds and certainly not from my intellectual grasp of the philosophy of religion. I'm pretty sure that it's the songs you sing to God in your heart that indicate your salvation. When I hear my friend whistling that song across campus, I remember this: "Glory be to God who allows such miraculous things to occur in the hearts of men." and this: "He who searches hearts and minds knows what is the mind of the Spirit, because the Spirit intercedes for the saints according to the will of God. And we know that for those who love God all things work together for good, for those who are called according to His purpose."