More Than Just a Nod
The filmmakers of Nosferatu weren't able to secure the rights to Bram Stoker's Dracula, but forged ahead by filming nearly the same storyline and simply changing the names of the characters. This did not go unnoticed by Stoker's widow, who unsuccessfully took legal action to suppress the film's production.
The Real Deal?
2000's Shadow of the Vampire starred Willem Dafoe as Max Schreck and John Malkovich as F.W. Murnau, and imagined that Schreck was actually a vampire that Murnau cast as Count Orlok for the sake of realism. Dafoe was rewarded for his efforts with Oscar and Golden Globe nods and an Independent Spirit Award win.