It is not Hortensius who Heel Face Turned to Cicero's side, but Cicero who Face Heel Turned to side with Hortensius and the aristocrats.
Mark Antony is regarded by Cicero (and Tiro) as a bloodthirsty, power crazed thug. On the other hand, Cicero has Antony's stepfather executed without trial and proclaims the assassination of his mentor Caesar to be the greatest act in the history of the Republic. From Antony's point of view, it's quite possibly Pay Evil unto Evil.
Nightmare Fuel: In Dictator, Cassius's after-action report describes, in vivid detail and blunt, clinical language, the slaughter of Crassus's doomed expedition at Carrhae.
Film
Memetic Mutation: Given the fact that Daniel Radcliffe plays the protagonist there are several memes involving this film and Harry Potter.