The villain - played by David Morrissey - lost an eye and saw his zombie daughter slaughtered by Michonne (Danai Gurira) in the drama's mid-season finale.
"We haven't seen him activated to the extent that he's going to be activated in the back half of the season," exec producer Kirkman told TVLine. "He's going to be much more engaged and a little bit more aware of the threat that the prison represents."
Kirkman also hinted at the fate of Rick (Andrew Lincoln), explaining that the former sheriff's deputy is "spiralling out of control".
"He's a person who's bearing the weight of everyone's survival on his shoulders, and I think that's become a little bit unbearable," the writer explained.
"He's certainly spiraling out of control. And now he's starting to see [dead people]. It's definitely a real problem."
The Walking Dead will return to AMC in the US on Sunday, February 10 at 9/8c, with new episodes premiering in the UK on FOX (formerly FX).
> The Walking Dead renewed for season 4, showrunner Glen Mazzara exits
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Watch a promo for the return of The Walking Dead below: