Can you list the main/strongest arguments for a dating of the text to Domitian's reign, vs. Nero's?
Based on our traditions about when persecutions happened, it seems that he would have been punished under Nero or under Domitian. Other emperors around them were not known as persecutors. Vespasian was not seen as an anti-Christian persecutor, and he had Christians as his relatives like Domitilla. Likewise, historians say that Nerva relented of Domitian's abuses against Jews and Christians. There was a coin made for Nerva saying that he relented of the Roman abuses of the "Jewish Tax", for example.
I think that the Beast probably refers to Caesar Nero (666 in Gematria), and it has the story of the beast with the wound on his head, and Nero was stabbed in the neck. There was a theme among Christians of the time of Nero returning as the Antichrist, like in the Christian edition/version of the
Sibylline Oracles. So this tends to suggest that it was written after Nero's 68 AD killing.
The Acts of John are considered to be written around 180 AD, and they say that Domitian exiled John.
Eusebius reports that John was returned from exile after Domitian's death by Nerva. Eusebius lived centuries later, but he was a historian going by earlier writings, some of which are lost, so his records have merit.
As far as I can tell, Nero's persecution was of Christians in Rome in the wake of the fire in Rome, and he killed them, like by having lions eat them. I'm not aware of Nero exiling Christians. In the case of Domitian, however, we do have records of him using exile to punish Christians like Domitilla. Since Nero was trying to find scapegoats for the fire, it wouldn't do as well to bring someone from Ephesus in Turkey to Rome, although that kind of thing could have been an ideological distraction for the fire's blame.
There is some internal evidence in the text for a dating for Revelation to Domitian's time presented in the Christian Courier article, like how Revelation complains that one of the Churches of Asia Minor abandoned its "first love". the implication is that this Church in Asia Minor had been founded a while back, and it fits better with the Church there being in the 90's AD than in about 64 AD under Nero, since that Church I suppose would have been founded in 40 AD-60 AD.
I find Irenaeus' quote to be ambiguous as to whether it's saying that John or the vision were seen recently. I appreciate your translation. Since you didn't use the word "Since" in it, it seems less likely to refer to John than I had thought it might when I read the translation on New Advent.
Reviewing the quote in your translation and bearing in mind our discussion about Against Heresies 2.22:5, I notice another possible argument that Irenaeus meant that the vision was seen by John in Domitian's time. In Against Heresies, Irenaeus says that John the Disciple of Jesus conveyed the information that Jesus reached old age as a teacher. In that quote, I believe that Irenaeus meant that John the Disciple had a vision of Jesus being in old age in the book of Revelation. This is because in the Book of Revelation, we do have an image of Jesus as being an old man. Also in that passage, Irenaeus said that John, this Disciple of the Lord who conveyed this information, lived into or "up to" the time of Trajan: ("And he remained among them up to the times of
Trajan.").
Further, in the passage where Irenaeus talks about either the vision or John being seen, he says that the object in question was seen toward the end of Domitian's reign. ("Through that one it would have been declared, who also saw the apocalyptic vision, for he was not seen a long time ago, but nearly in our time, toward the end of Domitian's reign.") Had Irenaeus been talking about John in this sentence, he would tend to have repeated that John was seen up to Trajan's time, because the point of Irenaeus' statement was how recently the object in question was seen.
I guess Irenaeus could have been using the phrase "up to the times of Trajan" as a shorthand for saying that John died in Domitian's time, but if that is what he meant, it would have been more precise if he wrote "Nerva's time" instead of Trajan's. This is because Domitian died in September 96, and Nerva ruled from there to Trajan's reign. Trajan's reign began in 98 AD. If we say that John lived up to the time of Trajan, then the normal suggestion for me is that he lived to about 98 AD. If you say that "Bob lived up to the ripe old age of 80," it implies to me that Bob passed his 80th birthday, not that he lived
almost up to 80.
In contrast, the traditional date for John's exile on Patmos where he saw the vision is that: John was exiled there toward the end of Domitian's reign, saw the vision, then Domitian was killed in Sept. 96, and then John was released by Nerva, so that John served less than 2 years total in exile. So to say that the vision was seen toward the end of Domitian's rule would fit with the traditional dating of John's exile toward the end of Domitian's rule.