"Why is the play called Julius Caesar if he dies half way through? Isn't it really about Brutus?"
That's a common enough question for a high school English exam. Future students who are going to go googling for an answer to that one will hopefully stumbled across David ("Master of Verona") Blixt's post on the subject in which he combines his not inconsiderable Shakespeare experience with his recent research in Roman history to answer this and many more questions. It's certainly true now that most people have trouble separating what really happened to Caesar, and who he was as a person, from what Shakespeare had to say about him.
In fact, David's post is an announcement of the play he's just written, which takes place between Caesar and Brutus the night before the Ides of March. "The great flaw, to me," writes Blixt, "has always been the lack of interaction betwen Caesar and Brutus. For men with such a tangled personal and political history, the play is remarkably slient regarding their past."
Sounds like a great idea to me, and I wish him much success with the project!