Paul Before Another King Herod
Luke is very deliberately showing that what happened to Jesus is also happening to Paul—Paul even stands trial before a (different) King Herod. I think the point is that Jesus told us to take up our crosses and follow him, and here we see how Paul is following in his footsteps. When similar (though of course different) events happen to us, we should not be surprised,
P.S. Be sure to read the Wikipedia article about Herod Agrippa II, the Herod in today’s passage.