Jesus has successfully subverted all attempts to trap Him. The chief priests, scribes, and elders had challenged His authority with no success. They sent spies to try and trap him with a political question and that didn't work either. Today it will be the Sadducees coming at Him with a theological question.
As Jesus answers, we get to hear something about the resurrection from the dead. Is there life after death? What is it like? Who gets to experience it?