And currently don't have a brain power to actually write this into a story so I'm going with this for the moment.
What is Troy has a lady friend? Romantically involved lady friend?
What is that lady friend has a daughter?
And that daughter was only a few years old back when the dam was blown up, but that daughter was the one who found Troy unconscious?
That daughter was the one that told her mom about the man needing help and was the saving grace for Troy's life? 
What if the mom brought Troy back and helped him heal?
What if she was another scientifically inclined individual? In someways like himself.  so after so many years of him helping to build a safe haven for her and her daughter, which is now like his own, she has now been able to create a vaccination of sorts. Not a "cure" but some thing to help not get the disease from the undead.
And what if that was part of the cause of how P.A.D.R.E found and took her daughter? The daughter that Troy sees as his own as well.
When Troy finds out that it's Madison now controlling P.A.D.R.E , he has multiple vendettas that can be fixed by dealing with one person. He could have revenge for what she did to him and what he has taken from himself and the woman he loves.  
 This and that happens and the woman tends to keep her distance from Madison. She knows that if Madison says anything that she might snap. She despises Madison for what she did to Troy but most of all for what she is harboring and keeping her child from her. 
But on their track through the swamps in the woods to get to the supposed P.A.D.R.E encampment, Madison starts up. 
The woman ignores it for a minute or two. The militia didn't notice that everyone was headed forward quicker than she and Madison, leaving the two of them in the back of the herd.
The woman swivels on her heels and lands a full fist into Madisons jaw. Stepping away as Madison falls to the ground and the rest of the group begins to circle around.
Madison's plan pays off as she runs her mouth and sees the woman getting more and more anger in her eyes. And watches as Troy stay silent, watching the scene unfold. 
The woman grabs a knife from one of the militia men's belt and throws it in Madisons direction as it lands in the dirt. She tells her if she wants to fight then it'll be a fair fight as she cuts Madison's binding on her hands and waits for Madison to make the first move.
As she does the woman dodges, lands striking blow to the back of Madisons skull and flips her on her back. Her own blade digging into Madisons skin of her neck as she straddles above her.
"You try to think we're the same but I am nothing like you. You look at us like we're the monsters, the bad guys. While you stole everything from us."
The woman's hands shake as she wants more than anything to end Madison right where she lays. She gets up quickly bouncing to her feet and yells back as she passes through the crowd of militia and the outsiders, not looking up to see Troy's face as she passes him.
"I wouldn't test my morality, Madison. But I'm not gonna do the favor of silencing your Deathwish just because you can't do it your fucking self."
The entire crowd is silent as the woman heads off down the road they were heading. One of the militia men standing next to Troy asks if he should join the woman and Troy finally speaks up.
"No. Make sure Madison gets locked up again and start heading south. We'll be a few steps ahead of you."
Troy jogs to catch up with the woman as she heads south. He knew better than to say anything and let her open up first. He looked over to her every few seconds and saw her anger turn to pain and then what looks like sadness.
"I wanted to kill her. I wanted to feel like I did something and I stopped the person that has hurt so many, that hurt you. I wanted revenge."
"Then why didn't you?"
She stayed quiet for a few moments. Falling back the tears that were ready to barrel from her eyes.
"I thought about how you would look at me after. You don't really want her dead Troy. I know you would end up hating me if I did it. You would never look at me the same and I thought of what that look would do to me."
I decided to start drinking early today because my brain tells me it's 5 o'clock somewhere but then I started watching Fear The Walking Dead and it brought up so many ideas and things that I never thought about previously.... and then I saw the thing that came out today for the second part of season eight (that I still don't know when he's actually coming out) end it totally showed parts of Troy and I got very excited and now I have even more ideas in my brain but I can't put anything to paper because my brain will not let me!
Here I was, feeling like a failure for not writing the fic or just idea of what I had with Troy coming back in time for us to see the character on the final season.... guess I don't have to feel like that big of a failure and I could still work on it since we got JACK SHIT as far as you can tell me.
Yes, I know we got a glimpse of what we got and I'm not gonna go into detail in case that's even more of spoilers than I've already said... and everything else that we saw... but I could still be disappointed and slightly infuriated.
