From the trailer the sequel looks like a remake of the first one.
1. The protagonist is a nobleman who falls from the throne to become a gladiator. (The trailer clearly shows the protagonist is the nephew of the emperor of the first movie, in theory, he should be emperor in the sequel.)
2. The protagonist is driven by revenge to kill someone.
3. The emperors would die in the movie. (I said the emperors would die in the sequel because that is what happened in history.)