During the montage towards the end when various clips flash before the Nerd's eyes, a brief shot of Super Mecha Death Christ is seen. Said character wouldn't be properly introduced until The Wizard and Super Mario Bros 3 (2008). There's also footage of Bram Stoker's Dracula for Sega CD, which wouldn't be reviewed until Dracula (2008).
Fred Savage: Savage Attack, a fake NES game, is seen during the montage towards the end.