He only had a few appearances in the comics as well. You can only do so much with him as an unstoppable/immortal killing machine. I think they did a good job establishing how much of a force he was, and found a way to sideline him that was ambiguous enough that it's easy to bring him back.

I think now they pivot towards the "neo-fascists in white suits" (not going to say their name due to spoilers). And they've started hinting around Jesse's family, so I'm guessing they make an appearance in the season finale or something.