There are ways built within each sci-fi franchise they've ruined to retcon all the shit that happened since they took over and set it back to when it was good. The thing is that they won't. If they were capable of recognizing that it's their own heap of shit that needs to be shoveled away for the franchise to be worth it again, they wouldn't have filled it with shit to begin with. They're not going to fix Dr. Who. They're not going to fix Star Trek. They're not going to fix Star Wars. They're not going to fix anything.