Trivia: Stan Lee makes his customary appearance whilst the Avengers and a load of War Veterans are enjoying a get together. Thor offers a 1,000 year old Asgardian drink to Captain America, and Stan Lee asks for some. (00:25:15)
Trivia: When Bumblebee first appears it parks itself in the used car lot beside a yellow Beetle. The yellow Beetle was Bumblebee's original form in the Transformers cartoon series.
Trivia: When Mr. Jimmy is calling out names on the boat to see who's missing, the real Mr. Jimmy Harrell is standing next to him, wearing a dirty grey T-shirt (and presumably playing a random rig worker). You can first see him (from the back) when Russell calls out Caleb Holloway's name. The first view of his face is just as Russell gets out the life raft onto the deck of the rescue ship. (01:28:30)
Trivia: The Christmas ball scene is symbolic: since it is a masquerade party all the guests are in disguise. The only guests who aren't wearing masks are Bruce Wayne and Selina Kyle. This implies that their real personalities are Batman and Catwoman respectively, and that their public persona is the real disguise.
Trivia: Warwick Davis plays one of the marauders. He also played Wicket the Ewok in Return of the Jedi.
Trivia: Stan Lee makes his customary cameo appearance as a security guard at the Smithsonian who is present when Steve Rogers steals his original Captain America suit from the museum display. (01:30:00)
Trivia: While Mr. Freeze is at Shaugnessy's, when Shaka smacks Dick across the room, he ends up flat on his back, and in the close-up when Dick raises his head, the buttons on his vest switch sides momentarily. Then the buttons revert back (noted in trivia because it's better when clicked through slowly). (00:24:25)
Trivia: While Lin (played by Jackie Chan) is in disguise and working in his daughter's school cafeteria, his name tag shows Jackie Chan. (00:31:25)
Trivia: Right after Mr. Peck the EPA man forces the Ghostbusters to shut off the grid and the energy is released into the sky, an ad for Stay Puft can be seen on a building. (01:09:00)
Trivia: When Rory is walking down the street wearing the Predator mask, there is a bright red/orange alien walking toward him. This is a nod to the original Predator costume that looked like a big bug, the red/orange color was used to film the stealth camouflage scenes. The bug suit was scrapped after a few test shots proved how silly it looked. Jean-Claude Van Damme was in the original costume, but he was let go when the costume was scrapped. (00:45:20)
Trivia: In Lori's dream, kids teasing a young Jason place a burlap sack on his head, similar to the burlap sack Jason wore in Friday the 13th Part 2. Jason started wearing the goalie mask in Friday the 13th part 3. (00:08:00)
