Summer blockbusters don't just line the pockets of film studio executives and actors working on a percentage of the gross, it looks like they help resellers of licenced games too. According to a bit of research from the Video Game Price Charts blog—I've used them in the past when selling my unwanted games via eBay—the time to strike when selling your copy of Indiana Jones and the Infernal Machine or Iron Man / X-O Manowar in Heavy Metal is when the movie adaptations hit theatres.
Yes, there's even a market for the terrible PlayStation Speed Racer game! Plenty of interesting charts and graphs await hopeful auctioneers at VGPC. I'm off to put a spit shine on my copy of The X-Files for PSone in anticipation!