The first prompt that is presented (#1) gives information that is sure to play a key role in the way that certain things unfold in this play. James E. Miller, Jr. Describes Julius Caesar as "a great conqueror, soldier, and politician" who "gained territory for Rome… and frequently sent money back to the city to be used for public works or to help the common people." In doing so much for Rome, Caesar’s popularity and support from the people must have been enormous. And because Caesar was also a very intelligent man, he had the presence of mind to use that popularity in his favor. He did so by listening to what his people were saying and then by essentially giving them what they asked for. This only furthered their support of him until the point where he was named "dictator for life".
In terms of the play, Shakespeare will undoubtedly use that popularity in order to establish a number of conflicts. His popularity can be used to irritate those in his shadow, thus prompting themes such as deceit and envy. It also can be used to first glorify him, and then perhaps show his flaws as his every moved is watched in anticipation. However, no matter what themes are developed, they almost certainly will be able to be related back to his popularity.