Immediately after the title verse, Mark cites the prophets to introduce John the Baptist as the forerunner before Jesus appears.
Chapter 1 in Mark: Mark opens with urgency: Good News, John’s preparation, Jesus’ baptism and temptation, the call of disciples, and a cascade of authority in Capernaum—teaching, exorcism, healing, and prayer.
In Mark’s early chapters, Jesus’ authority in word and deed raises the question of who He is.