First, according to Baha'i beliefs, there are
two kinds of Prophets, independent Prophets and Prophets who are followers and promoters of the independent Prophets.
Question.—How many kinds of Prophets are there?
Answer.—Universally, the Prophets are of two kinds. One are the independent Prophets Who are followed; the other kind are not independent and are themselves followers.
The independent Prophets are the lawgivers and the founders of a new cycle. Through Their appearance the world puts on a new garment, the foundations of religion are established, and a new book is revealed. Without an intermediary They receive bounty from the Reality of the Divinity, and Their illumination is an essential illumination. They are like the sun which is luminous in itself: the light is its essential necessity; it does not receive light from any other star. These Dawning-places of the morn of Unity are the sources of bounty and the mirrors of the Essence of Reality.
The other Prophets are followers and promoters, for they are branches and not independent; they receive the bounty of the independent Prophets, and they profit by the light of the Guidance of the universal Prophets. They are like the moon, which is not luminous and radiant in itself, but receives its light from the sun.
The Manifestations of universal Prophethood Who appeared independently are, for example, Abraham, Moses, Christ, Muhammad, the Báb and Bahá’u’lláh. But the others who are followers and promoters are like Solomon, David, Isaiah, Jeremiah and Ezekiel. For the independent Prophets are founders; They establish a new religion and make new creatures of men; They change the general morals, promote new customs and rules, renew the cycle and the Law. Their appearance is like the season of spring, which arrays all earthly beings in a new garment, and gives them a new life.
With regard to the second sort of Prophets who are followers, these also promote the Law of God, make known the Religion of God, and proclaim His word. Of themselves they have no power and might, except what they receive from the independent Prophets.
43: THE TWO CLASSES OF PROPHETS, Some Answered Questions, pp. 164-165
The Prophets of the OT who prophesied the coming of future independent Prophets were followers and promoters, which explains why they predicted the coming of the independent Prophets and wrote prophecies about them, so that people in the future would recognize them when they appeared.
Baha'is normally refer to the independent Prophets as as Manifestations of God, or Messengers of God.
You are correct. Prophecies do not have to be 'about' a Prophet. They might be about the Prophet but they can be about an event.
The prophecies I am referring to are about the 'person' who return of Christ who I believe was the same person as the end times messiah who was prophesied in the OT, and they are also about 'events' that would transpire during his lifetime and after he died.
It really does not matter what happened thousands of years ago or if the event prophecies that refer to the past were fulfilled or not, since the past is gone and is not relevant to the times we are now living in.
Some of the end times prophecies refer to events that were fulfilled by the coming of the person who would be the return of Christ/end times messiah, things that that person would do during his lifetime and other event prophecies would happen after he died,, during the messianic age, which will last no less than 1000 years from his coming.
Please note that when I say 'end times' I am referring to the end of an age, not to the end of the world. End times is the end of the Age of Prophecy, which marks the beginning of the new age, which is called the Age of Fulfillment, the age which I believe we are now living in.