Man was excommunicated by Pius XII after his heretical views came to light. Costa supported:

celebration of the Mass and administration of the sacraments in the vernacular language;
permission for clergy to marry;
the abolition of auricular confession, replacing it with general or communal confession and absolution;
distribution of Holy Communion to the laity under both kinds (i.e., bread and wine);
institution of the permanent diaconate for married persons;
celebration of the Mass "versus populi" (facing the people) with the priest behind the altar;
creation of a Council of Advice, composed of bishops who would govern the Church together with the Pope;
participation of laypersons in the administration of the Word, of the Eucharist, and in evangelization

http://en.wikipedia.org/wiki/Carlos_Duarte_Costa#Attempts_at_church_and_societal_reform

Much of his vision came to light post V2....