Rosemary's necklace in ROSEMARY'S BABY. Stuff happens and it ends up that an evil dude (who looks like if the bad guy from THE KEEP had joined a black metal band) wants the orb in order to use it as a weapon to kill like everybody. Later on Star-Lord crosses paths with some other folks and they end up becoming friends. Awww.
I've only seen a handful of these Marvel Cinematic Universe films (and I've only reviewed one: THOR), so I'm not a expert on if this movie was good or not from a comic book fan perspective, but from an entertainment perspective...I liked it. Quick pace, impressive special effects, good acting, intriguing characters (I especially liked Drax). That said, I can't ever see myself wanting to watch it again.