The cereal box Apple holds when making breakfast for The Kid reads "Soleil Vert". In French, this means "green sun", which was the title of "Soylent Green" in French. Also, when Bagu is seen leaving town, The Kid tells him the water in Bagu's bottle is made from people, as was the food known as 'Soylent Green'.
Michael Ironside plays a tyrant who forces prisoners to engage in life-or-death games for his and his followers' amusement. Additionally, the main character in both films has a female companion who is revealed to be a gynoid.