[video=youtube]https://www.youtube.com/results?search_query=ready+player+one[/video]
There are tons of references in there. Including several characters from various things, often heavily shadowed. The Iron Giant, Freddy Kruger, Deathstroke, the birds and riders from Joust, Duke Nukem, Harley Quinn, and I'm sure several more I didn't notice.
Vehicles include Kaneda's Bike, the DeLorean from Back to the Future, Mad Max's car, the A*Team Van, and what looks like it might be Kit from Knight Rider.