The Scene: It's possible that the latest Ant-Man trailer has already given away one of the movie's funniest and most unexpected gags, that Thomas the Tank Engine makes a cameo appearance near the end of the film during a battle between Ant-Man and Yellowjacket on a toy train set. The scene shows Thomas falling off the tracks and crashing to the floor below: could the post-credits scene return to Thomas, and maybe show Lang's ants putting the poor guy back on track? How Likely Is It?: 2/10. It could be a fun gag, though the feeling might be that it would just run the joke into the ground, given that it's most likely a fleeting moment in the movie. Again, never say never, but blowing a post-credits scene on something so "trivial" would be an easy way to leave a lot of fans angry and irritated.