The plot of The Cursed Child is built around a Time Turner constructed in secret by the Malfoy familiy and what happened everytime the original history was altered. I believe in one of the timelines Cedric became a Death Eater.
Now, as to how canon is it? YMMV, but my headcanon is that Cursed Child is just fanfic written by Rita Skeeter
Now, as to how canon is it? YMMV, but my headcanon is that Cursed Child is just fanfic written by Rita Skeeter
“We can never undo what we have done. We can never go back in time. We write history with our decisions and our actions. But we also write history with our responses to those actions. We can leave the pain and the damage in our wake, unattended, or we can do the work of acknowledging and fixing, to whatever extent possible, the harm that we have caused.”
— On Repentance and Repair: Making Amends in an Unapologetic World by Danya Ruttenberg
— On Repentance and Repair: Making Amends in an Unapologetic World by Danya Ruttenberg