Once again, bringing you another installment in our continuing series of attempts to create terms for things specific to comics that don't yet exist, but should. Oh, and for those who asked, this is totally not me being snarky via professorial and/or literary aspirations.
Legacy Disenfranchisement--Term given to a specific tendency when fans become creators to roll back continuity and/or character development to where they remembered it was 20-30 years ago, thereby alienating the fans who grew up reading about said character after that point.
The justification usually given for Legacy Disenfranchisement is that running the clock back will make the character more accessible to a younger generation, which is perfectly valid if you assume that child development has not changed one whit since 1975 or so.
Or, to boil this down to a one-sentence definition: "Thanks for keeping my seat warm, Wally West!"
(Special thanks to the good people at House to Astonish for inspiring this Witless Dictionary)