Even more specifically, Edgar Sawyer’s backstory did not have a familial relationship to Jack. The opening scaremonies were suppose to have Eddie walking out with the CDT carrying Jack’s head.
Edgar Sawyer’s backstory was one of revenge and carnage. The mask was melted to his face because he had been trapped in a fire. The fire occurred in his home haunt and was set by bullies. Somewhere someone must still have the Vault’s article that explained Eddie's original backstory. I’ll see if I can find the link.
I’m surprised Jack is still as popular as he is. It’s probably because most people don’t know his original backstory, and Universal has done its best to retcon him.
Edit: Confused Eddie’s original story with Cindy’s. He donned the mask to hide the scars. It wasn’t melted to his face.
Found link to original backstory:
HHN ICON: Eddie | Horror Night Nightmares