Revelation 1:1. 'The revelation of Jesus Christ, which God gave Him to show His servants-- things which must shortly take place.'Which 'time was at hand' and to 'shortly come to pass', not thousands of years and still waiting.
Revelation 1:3. 'Blessed is he who reads and those who hear the words of this prophecy, and keep the things written in it; for the time is near' [or 'at hand'].
These verses may present problems to premillennialists, but they must answer for themselves. They present no problem to the Amil, because
1. Neither of them speaks of the coming of the Lord Jesus Christ, but of the whole prophecy.
2. Because under the Amil system, the prophecy starts straightway. For example, the Rider on the white horse (6:2) was riding even as the book was being written, and war, scarcity, death and martyrdom were right there also. And of course the Rider still rides today, and war etc. are still right there with Him. And this will continue until Christ returns at the end of the age, the time of which no one knows (Matthew 24:36; 1 Thessalonians 5:2).