Pretty obvious one here as it's entirely visual; but you can still blink and miss it in-game. Come the point in 2K's fantastic third Bioshock instalment where you rescue Elizabeth from her tower, she'll begin experimenting with her 'tearing' ability to see through time and space. One such place she taps into is apparently 1980's France, as the theatre can be seen playing 'La Revanche Du Jedi', a nod to one of the working titles for George Lucas' third masterwork that would eventually become Return of the Jedi instead. Maybe in this alternate universe the prequels were a success, too?
