After James Heller killed Mercer and got rid of all infected inside the city, things were relatively back to normal. At least there was no more outbreak, and no Evolved supporting Mercer's crazy plan walking around. Blackwatch was still a problem, but surely Dana and Heller could take care of that too. you had been worried Heller was going to turn into a new Mercer, but despite getting his memories, he was still the same Heller we’d all gotten to know.
You found yourself missing Alex. The old Alex, before he went all evil and tried to solve all world problems by creating One Mind, before he started villain monologuing and acting all cunning and deceitful. Honestly, the way he used to talk and act had reminded me a lot of a cult leader, but you never dared saying that to his face.
No, you missed the Alex Mercer that had fought his way through the military, Blackwatch and Greene to get the answers he wanted, to stop what was going down. The Alex that protected his sister at all cost, that was angry but still had somewhat of a soft core - He wasn't exactly good, but he wasn't evil either.
But you knew that Alex was gone. There was only hope that if Mercer did come back (again), he might be a changed virus-person, no longer trying to pursue a future that sounded like insane cult-believe.
~ • ~
You had found Mercer's remains.
In their fight, Heller had ripped off and thrown away Mercer's arms. you knew that even the smallest bit of Mercer's body could form a new one if it managed to attach itself to another living being and consume it to form more biomass.
So now you knew that Mercer wasn't completely dead, and you didn't know what to do with that knowledge. Of course you were relieved, but a large part of you was also scared of what he was going to do next.