User blog comment:MHS0501/MY Biggest Problem with Total Drama All Stars:/@comment-4742462-20150806040939

They apparently did want to bring Owen back but they cut him because allegedly Scott McCord didn't want to voice him for a whole season again. And according to the trivia section for this season, Dawn & Harold were also considered at one point before being cut although I don't know if that part's true or not.

You might as well include Gwen in those examples of characters being derailed because as Stryzzar has said it felt like Gwen was actually replaced this season by some girly-girl who happened to look like her.