Did anybody bother to read this? From the article, the pope prefaces this statement by stating “This is the Church’s destination..” so, “We” refers to the people of the church, e.g. the saved, so yes all members of Christ’s church will be together.
“This is the Church’s destination. . . It is beautiful to think of this, to think of Heaven. All of us will be up there together, all of us!”
Yes, I think he is just referring to the believers here.
"Wherefore, my dearly beloved, (as you have always obeyed, not as in my presence only, but much more now in my absence,) with fear and trembling work out your salvation."