You have a classic property, one that's made money hand over fist for you for years, perhaps decades, but now, it's getting a little long in the tooth. Maybe it's dated, maybe recent installments have tarnished its name, maybe it's just bogged down in Continuity Lockout. Perhaps it's just not going well. Or maybe the creators just want to try something new. Resetting the thing to bring in new fans sounds like a good idea, but you're afraid the backlash among existing fans to a Continuity Reboot will be epic in its drama.
What to do? Well, instead of starting over, dip into the Troper Well and pull out a way of explaining you're not really tossing away the classic stories the fans love. No, this is an Alternate Timeline. Or a sequel set sometime after the events of the old series that mentions the things fans loved but quietly neglects or Retcons the things not so beloved. Perhaps it's a Retool where significant parts of the setting are changed and even most of the main cast are replaced going forward. Or a prequel, or a Time Skip, or even a separate adventure taking place somewhere else so you have an excuse not to mention the events of the original series, while not denying they took place.
Contrast Continuity Reboot, where the old story and continuing plot lines are explicitly abandoned and started over.