23rd Oct: It's time for the second TV Tropes Halloween Avatar Contest, theme: cute monsters! Details and voting here.
MacGuffin suddenly gets a sequel, and changing the title to something else might throw people off that this is a sequel. One of the ways to avert this is through a Franchise-Driven Retitling, downgrading the original to a subtitle with the main title being something more consistent. They very well couldn't have called the Indiana Jones sequel Raiders of the Lost Ark 2, could they? See also The Artifact. Often a direct result of Nothing Is the Same Anymore. Sometimes results in New Season, New Name. Happens often in poorly devised Alternate Universe Fan Fiction. Eventually this could turn a title into a Nonindicative Name. This can also happen on a larger scale with Network Decay. Not to be confused with MacGuffin Title.