I'm not saying he's wrong---but he's ONE author who came to this conclusion. And Revelations is about what is to come.
Just to warn you, I am not going to continue this conversation too much longer, but you are committing some very basic logical errors.
For example, you say that "Revelations (sic) is about what is to come." Okay, so what? According to your own words in your OP, "[A Catholic I met said] that the book of Revelations is what the Catholic mass is based on."
Just supposing for a minute that Revelation is exclusively eschatological, why would that prevent Catholics from basing the Mass on Revelation? Revelation can be about the end of the world and Catholics can still base the Mass on Revelation. There is no contradiction.
There are numerous instances in Revelation where John relates to God in various ways (beginning in chapter 4). For example, there are trumpets, acclamations, incense, public praise, etc. A basic implicit theme in Revelation is the relation between heaven and earth, between the divine assembly and the world of men. That is precisely what Catholics believe happens at Mass: heaven and earth touch. Why wouldn't Catholics incorporate elements of Revelation into the Mass?
To take one concrete example, a very prominent title for Jesus in the book of Revelation is "Lamb of God." It occurs 28 times. The only other place in the Bible where Jesus is called this is the Gospel of John where is occurs twice. Go to a Catholic Mass and you will hear those words used at least four times. Consider the dialogue that takes place directly after the sign of peace:
People: "Lamb of God, you take away the sins of the world, have mercy on us."
"Lamb of God, you take away the sins of the world, have mercy on us."
"Lamb of God, you take away the sins of the world, grant us peace."
Priest, holding up the Eucharistic host, "Behold the Lamb of God, behold him who takes away the sins of the world. Blessed are those called to the Supper of the Lamb."