If you look at the prophets throughout Scripture, unless I’m wrong, ALL of the prophecies had at least a partial fulfillment within the prophets lifetime. Ultimately, they may have had a greater fulfillment, but they were still addressed first and foremost to “this generation”.
If that is true, then you would assume that the Apocalypse of John had a partial fulfillment in the destruction of the Temple. Thus, Revelation would have been written prior to 70AD, during the persecution of Nero, rather than in the 90’s during the (somewhat lighter) persecution of Domitian.