Christ’s Olivet Discourse is shorter in Mark than it was in Matthew. It is still the longest continuous passage of teaching by Jesus in the Gospel of Mark.
The Old Testament prophets foretold a time when Messiah would reign over a world full of peace and prosperity. This would be a time when even the nature of animals would be changed and the wolf and lamb would dwell together. The Messianic kingdom is still to come and is often referred to as the Millennium.
As the Old Testament led up to Christ’s first coming, the New Testament has been leading up to this. Revelation 19 can be considered the climax of the entire Bible. The Messiah is coming, but no longer as a suffering servant. This time He comes as a conquering King, to judge evil and establish His kingdom on earth.