One of Tarantino's less noticeable signatures is his inclusion of cameos from actors who've either prolifically worked in the genre he's currently playing with, or have substantially influenced him in some way. Kill Bill was full of influential martial arts film actors like David Carradine (known for his iconic portrayal of warrior monk Kwai Chang Caine in the 1970s Kung Fu series), Sonny Chiba (who Tarantino also referenced in True Romance), and Gordon Liu (of The 36th Chamber of Shaolin) fame. Then of course there's the appearance of Franco Nero, the original Django, in Django Unchained. So, whatever science-fiction film Tarantino ends up making, it's bound to include cameos from some sci-fi greats. The more obscure the better.