The Walking Dead: Daryl Dixon spinoff has the potential to introduce a character from the comics who has yet to appear on TV, Rick Grimes' younger brother, Jeffrey Grimes. In the comics, Jeffrey relocated to Barcelona before the outbreak of the zombie apocalypse and was unable to return to the US to see his brother due to quarantine. He is presumed to have been bitten by walkers and killed in the comics, but it's unknown if he's alive in the TV show's continuity. If Jeffrey is introduced in The Walking Dead: Daryl Dixon, he could potentially reunite with his brother in the upcoming Rick and Michonne spinoff.