That is what we have in the Revelation of Baha'u'llah.
Baha'u'llah revealed everything we need to know and are capable of understanding during this age of history. More will be revealed in the future by the next Messenger of God as our needs and capabilities increase.
Jesus was a Manifestation of God (a Messenger of God, a mediator between God and man), just like Baha'u'llah. Jesus prepared the way for the coming of the Kingdom of God on earth by spiritualizing humanity with His teachings. Jesus changed the hearts of man so they would be ready to unite when Baha'u'llah appeared.
John 10:16
And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd.
Obviously that could not be accomplished at Jesus’ first coming, when He walked the earth, because the whole world could not even communicate with each other. It refers to a future age in history, when “there
shall be one fold, and one shepherd.”
Baha’is beleive Jesus is referring to His Second Coming, when all of humanity would be gathered together and become one people. The unity of mankind was the primary mission of Baha’u’llah. The one fold was prophesied in Isaiah 11:6-9 and the one shepherd was prophesied in Isaiah 9:6-7. It is a Baha’i belief that in the future there will be only one religion, the religion of God.
What Isaiah 11:6-9 means to a Baha’i is that in the future diverse religions and races will become comrades, friends and companions. The contentions between races, the differences of religions, and the barriers between nations will be completely removed, and all of humanity will attain perfect union and reconciliation.