Et Unum Sint

There's Ecumenism and then there's Ecumenism....
Holy Mother Church's two lungs will not be breathing together any time soon:

Papism is the womb of heresies and fallacies.... The entire chorus of Fathers ...regard Papism as a heresy because apart from the Filioque, it produced a host of other fallacies, such as the primacy and the infallibility of the Pope, the unleavened bread ... Purgatory, the immaculate conception ...
...it has altered nearly all of the teaching and the practice pertaining to Baptism, Chrismation, the Divine Eucharist and the other Sacraments, and has converted the Church to a secular State.

Contemporary Papism has deviated even further than medieval Papism from the teaching of the Church, to the extent that it no longer comprises a continuance of the ancient Church of the West. It has introduced a swarm of new exaggerations ... It has adopted further innovations to Divine Worship, such as dances and musical instruments. It has shortened and essentially ruined the Divine Liturgy. In the area of Ecumenism it has set down the bases for the Pan-religion with its 2nd Vatican Council, by recognizing "spiritual life" in the people of other religions. Dogmatic minimalism has led it to a minimizing of moral prerequisites, on account of the bond between dogma and morality, ... By continuing to support "Unia" - that caricature of Orthodoxy with which it victimizes and proselytizes faithful - Papism is sabotaging the Dialogue and is contradicting its supposedly sincere intentions for union....

Generally speaking, there has been a radical change in Papism and a turn towards Protestantism after the 2nd Vatican Council, and even an adopting of various "spiritual" movements of the "New Age".
...Papism caused more damage to the Church than all the heresies and schisms put together.

But all is not bleak, there are instances where two have come together and become one:

The outlines of the new WQXR-FM emerged Thursday two days after its owner, The New York Times Company, said it would hand over its license to the public-radio station WNYC.

QXR was, is one of the great classical music stations, and I don't altogether trust that TPTB at the new conglomerate won't gut it, or at least geld it as the did WNYC, but at least its alive for now.