So, if you reflecting on Luke 19:28-40 (triumphal entrance) and Luke 23:1-49 (the trial and crucifixion), then you may also be willing to spend some time with Luke 22:14-56 (the back story to the crucifixion and afterwards).
Jesus is aware of what is awaiting him in Jerusalem. He shares a passover supper with the apostles. He takes a loaf of bread, gives thanks, breaks it, and gives it to them, saying "This is my body which is given for you. Do this in remembrance of me." We recognize these four steps and the words as part of our Christian eucharist each Sunday (or once a month, or maybe, quarterly).
They begin to dispute over who is the greatest. I hope this practice is not a weekly one in your congregation--or monthly or even quarterly.
Jesus predicts Peter's denial. What have we learned about ourselves during Lent?
Jesus chose Peter knowing that Peter would have moments of failure.