User blog comment:Epic~00/TOTAL DRAMA IS OFFICIALLY RETURNING/@comment-26453158-20170504195456/@comment-11883116-20170504215356

It's actually his plot with Sierra that they thought was finished. He was also confirmed not to be attracted to Gwen anymore on Fresh's Tumblr (not too reliable source though since they aren't the creators themselves and I doubt they contact them), thus ending his other major plot.

Trust me, I believe his plot with Sierra isn't over too. I've included my ideas about what can be still done with Cody on my blog that I mentioned earlier.