Protestant Union

As far as the news of the Ecumenical world goes, two large Protestant groups are getting together to form a "mega-church." The World Alliance of Reformed Churches and the Reformed Ecumenical Council are getting together and forming the World Reformed Communion. So that's approximately 87 million Protestants who are going to agree on something? I don't mean to sound pessamistic, but if this is true, and they really are going to agree, then what are they going to agree on? Are they going to have doctrine or no doctrine (it will be a doctrine of their "church" either way)? Are their pastors going to go to seminaries that teach the same things? If not, what is the point of joining together? If so, then what are they going to believe? If they will all share the same beliefs, aren't they quickly going to find that some beliefs of one of the smaller churches that is a member are contradictory to the other churches? If this is just for the name, then what's the point of actually joining? Maybe I am too skeptical about it, but c'mon, why don't you all just convert to the Church where people are all supposed to believe the same things, where the seminarians are supposed to be taught the same things world-wide, and where we can trace our history to Jesus Christ rather than to Protestant deformers? As the article I read states:

"The member churches of the two groups trace their roots to the 16th-century Reformation led by John Calvin, John Knox and others, as well as earlier reform movements such as those of the Waldensians in the Piedmont valleys of Italy and of the followers of Jan Hus in the Czech lands."

Jesus or Calvin? Jesus or Knox? Jesus or Hus? Eucharist or wafer? Read the Bible, and you'll see that John Calvin is never mentioned in there. You'll also see that the Eucharist is Jesus Christ, Body, Blood Soul, and Divinity. Read the article here.